Serpentina Treatment: A Review of Literature
Serpentina Treatment: A Review of Literature
                                                                          T HE plant rauwolfia is named after the                     patala garud or atalaganidhi (Telegu), covan-
                                                                                 German doctor and traveller Leonhard                 namiloori (Tamil), chuxvanaavilpori (Malay)
                                                                                 Rauwolf, who in 1582 published an                    and as dhannerna or dhan-barua (Oriya).
                                                                          account of his many travels. Roots of the plant               Of the 130 odd species of rauwolfia, which
                                                                          Rauwolfia serpentina (Benith) have been                     are said to occur indigenously ill the tropics,
                                                                          recognized in India and the _Malay peninsula                Youngkeln'50 has given an excellent description
                                                                          from ancient times as antidotes to the stings               of the following fire, viz. R. serpentina, R.
                                                                          and bites of insects and poisonous reptiles.                canescens, R. micrantha, R. densiflora, and R.
                                                                          Mention of the plant is found in an old Hindu               perakensis. Eight species of rauwolfia grow in
                                                                          manuscript (1000 B.C.)128 as well as in the                 India; according to origin or source of supply,
                                                                          monumental works of Charaka (second cen-                    it is customary to recognize the Bengal,
                                                                          tury, A.D.), under the Sanskrit name of                     Bihar, Assam, Dehra Dun and Ceylon varieties
                                                                          "sarpagandha." It has also been used as a                   of rauwolfia in the Indian market; these show
                                                                          febrifugue, as a stimulant to uterine con-                  considerable differences inl quality and content
                                                                          tractions, for diarrhea, dysentery, insomnia                of the therapeutic alkaloids. The most useful
                                                                          and insanity. For just over two decades, its                variety of rautwolfia from the therapeutic
                                                                          clinical application has been extended with                 standpoint is Rt. serpentina, which grows to a
                                                                          success to the treatment of high blood pres-                height of one and one-half to three feet and
                                                                          sure.132                                                    has pinkish-white flowers.
                                                                             R. Serpentina or the serpentina plant is a
                                                                          large climbing or twininig herb or shrub,                               CHEMICAL COMPOSITION
                                                                          belonging to the natural order Apocyanaceae,                  Early researches suggested the presence in
                                                                          and found in the Himalayas, Assam, Pegu,                    the R. serpentina plant of all alkaloid, which
                                                                          Java, Tennasserim, Bihar, Deccan peninsula                  was provisionally named psendobrucine. Since
                                                                          and the Malay peninsula. It is variously known              1931, the chemical structure or composition of
                                                                          as sarpagandha (from ancient times), chandrika              the plant has been the subject of investigation
                                                                          (Sanskrit), chota-chand (Hinidi), chand (Ben-               by numerous observers.
                                                                          gali), dhan-murua or dhanbarua or pagla-ka-                   Ill 1891, Dymock,42 for the first time,
                                                                          dawa (Bihar), chandra, chota-chanid, karavi                 detected the presence of an alkaloid and a
                                                                          or harkai (Bombay), harkaya (M\arathi),                     yellow resin in the root of R. serpentina.
                                                                            From the Department of Cardiology, King Edward               In 1931, Sen and Bosell found two alkaloids
                                                                          Memorial Hospital, Bombay, Indita.                          in its root (the total alkaloid content being
                                                                                                                                220                         Cl'rulation. Volume XII, August, 1955
                                                                                                                   RUSTO-M JAL VAKIL                                         '2j2 1
                                                                          about 1 per cent of the dried root), ill addition    depressant to the heart, respiration and central
                                                                          to fair quantities of resin and starch. Siddiqui     nervous system, the serpentine group causes
                                                                          and Siddi(ui"7 (1931) found, besides phytos-         paralysis of respiration, depression of nerves
                                                                          terol, oleic acid and unsaturated alcohols, five     and stimulation of the heart. Sen and Bose"'
                                                                          alkaloids with different physical characteristics    (1931) reported a small drop of blood pressure,
                                                                          and molecular formulae, classified by them           a depression of the heart muscle, respiratory
                                                                          into two groups, viz., (1) the ajmalinie group       stimulation and relaxation of smooth muscles,
                                                                          of three white crystalline weak bases, ajmaline      in cats and other animals, after the administra-
                                                                          (C26H2602N2), ajmalinine (C20H2304N\), and           tion of R. serpentina alkaloids. Roy'04 (1931)
                                                                          ajmalicinie; and (2) the serpentine group of two     described dulling of sensations, sluggish reflexes
                                                                          yellow, crystalline stronger bases, serpentine       and sleep after large doses and death from
                                                                          (C21H2 304N) and serpentinine (C20H20033N 2).        respiratory failure after lethal doses. In 1933,
                                                                             In 1932, two Dutch chemists, Van Italie           Chopra and associates,24 working with the
                                                                          and Stenhauerl'37 isolated three alkaloids similar   total alkaloids of Rt. serpentina described
                                                                          in formula or structure to the ajmalinie,            valuable sedative, hypnotic and hypotensive
                                                                          ajmalininie and serpentinine of Siddi(ui and         properties.
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                                                                          Siddiquil 7-'0. They named their first alkaloid,        In 1940, Haniet63 observed, for the first
                                                                          rauwolfin (C21H2602N).                               time, the sympathicolytic activity of alkaloids,
                                                                             In 1939, Siddiqui'20 reported that the only       particularly, ajmaline and rauwsolfine, isolated
                                                                          two alkaloids obtained from the Dehra Dun            from R. serpentina (Benth), and remarked on
                                                                          variety of R. serpentina differed from those of      the hypotensive action of several of the
                                                                          the Bihar variety in their chemical structure        alkaloids.
                                                                          and melting points and named them iso-                  In 1941 and 1942, Chopra and his asso-
                                                                          ajmalinie or nieoajmalinie. In 1941, Mookheiji90     ciates26 27 reported exhaustively on the pharma-
                                                                          isolated all alkaloid from R. canescens, and         cological and toxic effects of R. serpentina root
                                                                          named it rauwolseine (C21H2603N2). M\uller,          extracts as well as of individual alkaloids; in
                                                                          Schlittler and Bein,92 in 1952, isolated a new       their experience, while the total alkaloids,
                                                                          alkaloid, reserpin, from R. serpentina, with an      alcoholic extracts and serpentine, particularly
                                                                          empirical formula of C33H4009N2. In 1953,            the last, possess valuable hypotensive proper-
                                                                          Chowdhury and Ghosh29 isolated yet another           ties, ajmaline and serpentinine are hypertensive
                                                                          alkaloid, hypotensin, from the serpentine            drugs. Bhatia and Kapur'2 (1944) reported,
                                                                          root.                                                after the administration in animals of the two
                                                                             Other alkaloids of R. serpentina more             alkaloids, isoajmaline and neoajmaline, stimu-
                                                                          recently isolated and described are, sarpagine       lation followed by depression of the central
                                                                           (C19H2202N2), isolated and described by Stoll       nervous system, and lowering of the blood
                                                                          and Hofmann'23 (1953), raupine (C2oH26O):,N2),       pressure in intact, spinal and decerebrate
                                                                          by Bodendorf and Eder13 (1953), rauhimbine           animals, with or without experimentally
                                                                           (C21H1260:,N2), and iso-rauhimbine (C21H260:1N 2)   induced hypertension. In 1944, Gupta, Kahali
                                                                          by Hofmann167 (1954), substance I (C2 2H2604N2)      and Duttt5 found that the crude resin isolated
                                                                          and substance II (C21H2503N2) by Popelak and         by Dymock in 1891, also possessed the sedative
                                                                          associates98 (1953) and reserpinine (C22H26-         and hypnotic properties of the serpentina root.
                                                                          04N2) by Schlittler and associates108 (1954).        Chakravarty'7 (1952) and Mukherjee9l
                                                                                                                               (1953) described the sympathicolytic effects
                                                                                     PHARMACOLOGIC EFFECTS                     of the alkaloid rauw olseine, isolated from
                                                                            The pharmacologic actions of the R.                R. canescens (Linn).
                                                                          serpentina root and of its individual alkaloids          \Iuller and associates92 (1952) and Bein8
                                                                          have been investigated from time to time.            (19553), on the basis of animal experiments,
                                                                            Oil the basis of experiments otn frogs,            found the new alkaloid reserpin to possess
                                                                          Siddiqui and Siddiquil"7 (1931) showed that          marked and long-lasting hypotensive, vaso-
                                                                          while the ajmalinie group acts as a general          depressor and sedative-hypnotic properties. In
                                                                          222                  RAUWOLFIA SERPENTINA AND HIGH BLOOD PRESSURE
                                                                          1953, Dasgupta and associates3" described the         hypertension only; the indications and sufita-
                                                                          sympathicolytic activity and adrenergic block-        bility of the case for the drug have not as yet
                                                                          ing activity of the purified total alkaloids and      been worked out."
                                                                          the oleoresinous fraction of ft. serpentina. In          A vague reference to the use of a tincture or
                                                                          their opinion, the hypotensive action of the          alcoholic extract of the root of R. serpentina,
                                                                          root is only partly due to the sympathicolytic        in cases of high blood pressure, was made in
                                                                          effect, other factors like peripheral vasodilata-     1942 by Paranjpe.9' He claimed improvement,
                                                                          tion being also concerned. Chowdhury and              without ally statistical support, inl most cases
                                                                          Ghosh21 (1953) reported the hypotensive effects       of hypertension; the hypotensive action was
                                                                          of a new alkaloid, hypotenisini, isolated from        said to be particularly gratifying in elderly
                                                                          the root.                                             subjects and in the case of the diastolic
                                                                             On the basis of experimnental and clinical         pressure.
                                                                          studies, the root of R. serpentina is said to have       Ill 1942, 13hatia," after employing R. serpen-
                                                                          the following pharmacologic attributes.132            tina ill the treatment of cases of high blood
                                                                          (1) By action on the vasomiotor center, it            pressure, both with and without renal damage,
                                                                          leads to generalized vasodilatation, with a           reported it as a useful and well-tolerated hypo-
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                                                                          either a good therapeutic response to the drug     and in occasionial cases of renal hypertension.
                                                                          or evidence of synergistic action. Bradyeardia     The pressure effect was said to start gradually,
                                                                          and lowrerinig of diastolic pressure were ob-      attaininig its maximum after two or three
                                                                          served in some of their cases, while pruritus      weeks; while nose blocking was comnmon after
                                                                          and urticaria were noted twice. In view of the     therapy, symptoms akin to collapse were
                                                                          acknowledged refractoriness of severe hyper-       rarely observed. The bradyeardia was found
                                                                          tensives to any form of therapy, the disappoint-   to be proportional to the degree of pressure
                                                                          ing results obtained by these authors are not      drop. Kleinsorge and Wittig75-76 (1954), after
                                                                          surprising.                                        using R. serpentina alkaloids in 84 classified
                                                                             From, New Zealand. In 1934 Doyle and            cases of hypertension, reported a systolic
                                                                          Smirk39 found reserpine, the alkaloid of R.        response in about 40 per cent of cases. While
                                                                          serpentina, in large doses (2 to 3 mg., thrice     subject ive improvement occurred in about
                                                                          daily), capable of inducing striking falls of      two-thirds of his cases, no alterations were
                                                                          blood pressure within four to six hours of         observed in the eye grounds, electrocardio-
                                                                          administration; unpleasant reactions, like         graphic tracings and renal function tests. In
                                                                          fatigue, drowsiness, depression, shivering,        1953, Marx95 found the drug useful in all
                                                                          feeling of heat, conjunctivitis, restlessness,     varieties of hypertension, including the nephro-
                                                                          nausea, vomiting and diarrhea, were observed       sclerotic and cerebral arteriosclerotic forms.
                                                                          after larger doses of the drug. An additive        He was greatly impressed by its sedative
                                                                          effect was noted in some of the cases treated on   qualities. M\eissner59 (1953) found it effective
                                                                          combined reserpin-methonium therapy.               in 90 per cent of hypertensive cases, normal
                                                                             From Germany and Aiustria. After using R.       pressures being restored within three weeks in
                                                                          serpentina in 25 cases, Vida13l in 1952 found it   many cases. An average lowering of 40 mm.
                                                                          effective in all kinds of high blood pressure      Hg of pressure was observed in cases of labile
                                                                          and superior to other hypotensive agents.          hypertension, of 28 mm. in fixed hypertension
                                                                          Arnold3 (1952), regarded it as (1) the most        and of 15 mm. in renal hypertension. A good
                                                                          effective soothing agent with a centrally          response was also noted in hyperexcitable and
                                                                          effective component knowl for the autonomic        thyrotoxic individuals. Watschingerl'43 (1953)
                                                                          nervous system and (2) a valuable hypotensive      found it superior in many respects to the other
                                                                          agent, particularly for cases of labile hyper-     better kniowX-n hypotensive agents. Runck105
                                                                          tension. Seliger110 (1952), after confirming       (1954) was impressed by both the hypotensive
                                                                          Vakil's work on the subject, recommended           effect of the drug, as well as by the complete
                                                                          continuous R. serpentina therapy in the treat-     absence of toxic reactions. He advised a
                                                                          ment of high blood pressure. Arnold and 13ock4     modification of dosage in cases of diabetes and
                                                                          224                24AUWOLFIA SEll PENTINA AND HIGH BLOOD IREISSURE
                                                                          cerebral arteriosclerosis. Jxlausgraber74 (1953),     hypertension, and without ill effects. In 195:3
                                                                          in Vienna, tried the drug in 8.3 cases of hyper-      Vakil'33 reported a good hypotensive response
                                                                          tension of diverse types; some cases were             to the alkaloid reserpine in 72 per cent of
                                                                          associated with renal an(l cardiovascular             cases, and few side effects. The accidental ad-
                                                                          complications. A satisfactory response of both        ministration of 10 times the therapeutic dose
                                                                          systolic and diastolic pressures was obtained in      to one patient merely resulted in a transitory
                                                                          6:3 per cent of cases. Although all cases were        feeling of lassitude and vertigo.
                                                                          subjectively improved, the electrocardiographic          Manay more studies, hitherto unpublished,
                                                                          tracings, retinal fields, renal function tests and    on the hypotenisive action of R. serpentina
                                                                          teleradiograms remained unaffected by the             root or of its individual alkaloids, either used
                                                                          treatment .                                           singly or in combination with hypotensive
                                                                             From Switzerland. In 1'953 Loffler and             agents like veratrum viride, hexaimethoniiun
                                                                          associates83 tried the alkaloid reserpin, isolated    and hydralazine, have been brought to light,
                                                                          from R. serpentina by Swiss workers, in 51            recently, from various parts of the universe.
                                                                          cases of hypertension. Adequate falls of              The results are said to be uniformly good in
                                                                          pressure were observed in only 14 cases and           mild and moderate cases of hypertension and
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                                                                          maintained for only 12 days in spite of con-          devoid of any serious or toxic ill effects. As far
                                                                          tinuationi of therapy. Subjec tive improvement        as can be ascertained, the results obtained with
                                                                          was reported in 16 cases, and side effects,           individual alkaloids of R. serpen/ina have not
                                                                          including fatigue, depression, excitability, pain-    differed materially from those obtained with
                                                                          ful extremities, visual phenomena, miosis and         the (rude extracts of the root.
                                                                          dryness of mucous membranes only inl cases
                                                                          treated with doses larger than 1.5 mng. per day.                 PRESENT DAY 'iSTATUS OF
                                                                             From Japan. In 1954 (oto22 found the                           R. Serpentina THERAPY
                                                                          alkaloid reserpin effective in 12 out of 13 cases       Il the short span of about 15 years that the
                                                                          of hypertension. The hypotensive action was           dried root of R. serpentina has beeni on the
                                                                          apparent three to seveni days after initiation of     market in India, this hypotensive remedy has
                                                                          therapy and maintained for t0 to 21 (lays after       gaiiled  such unprecedented popularity that
                                                                          its suspension. Nose block and "pharyngeal            the following statements canl be made: (1)
                                                                          bolus" were observed in three cases. Oii trying       There is hardly one patient with high blood
                                                                          various combinations of R. serpentirna with           pressure in that country who has not been
                                                                          veratrum viride and Apresoline in 72 cases of         subjected at some time or another to its
                                                                          hypertension, including 18 cases of renal             application'32. (2) In the experience of ovem 90
                                                                          hypertension, Goto obtained a hypotenisive            per (cet of Indian doctors, as revealed by a
                                                                          response of 30 mm. or over within a month of          (luestiomiaire circulated by Vakil in 1949,132
                                                                          the initiation of therapy in 83 per cetit of cases;   R. serpentina is the best "hypotensive" remedy
                                                                          this result was maintained for two to four            knownm. (3) One manufacturing firm alone
                                                                          months. Apart from o(ccasionial -vertigo and          claims to hare sold, prior to the year 1954,
                                                                          conjunctivitis, there were io side-rea(ctionls.       over 98 million tablets of the dried root, of
                                                                             From India. In 1952, (1hakravarty and              R?. serpentina.'6 (4) Shipments of the serpentina
                                                                          associates17 reported average systolic and            root in crude or tablet form have been sent
                                                                          diastolic pressure falls of 18.5 mm., and 16.4        from India to over 17 countries of the world
                                                                          mIm., respectively, on the tenth day of R.            within the last four years.'6 (5) It is said to be
                                                                          serpentina therapy. Mazimidar and \Iukher-            prescribed by over 60,000 physicians at the
                                                                          jee86 (1951) reported subjective improvemeint         present time. ' 6
                                                                          in all cases and a hypotensive response in 7
                                                                          out of 12 cases of hypertension. Chowdhury            R. Serpentina: Crude Extracts TVersus. Pure
                                                                          and Ghosh29 (1953), found the alkaloid "hypo-           A l1;aloids
                                                                          tensin ", isolated from R. serpentina inl Calcutta,     For many years now, and particularly after
                                                                          effective, even in small doses, in most cases of      the isolation of the alkaloid, reserpinie, a strong
                                                                                                                    RUSTOM\ JAL VAKI2I,                                         225
                                                                          controversv has been raging b)etween opposing         Le nunc( recognoscite usos del planta es enu-
                                                                          schools of thought about the relative merits or       merate se(uelntemente: (1) Per ager super le
                                                                          superiority of the one form of serpentina             centro vaso-motor, illo produce vasodilatation
                                                                          preparation over the other.                           generalisate con resultante effectos hypoten-
                                                                             The following argumenits have been put             sive. (2) Per su action depressive super le
                                                                          forward in favor of the alkaloid: (1) Being a         centros cerebral, illo (alma le systema nervose
                                                                          pure crystalline single alkaloid, it cannot           general. (3) Illo exerce un effecto sedative super
                                                                          produce undesirable effects from unknown              le mucosa gastric e un action stimulante super
                                                                          alkaloids in the whole root. (2) Being a single       le nonstriate musculatura del tubo digestive.
                                                                          known entity, results are likely to be more           (4) Illo stimula le musculatura bronchial.
                                                                          predictable. (3) _iuch smaller doses are                 Studios cliiiic ante le anno 1949 esseva res-
                                                                          required to obtain the same results. (4)              tringite a India. A ille tempore le autor del
                                                                          According to some observers, it is a much more        presente articulo publicava un articulo in
                                                                          potent hypotensive agent.                             Anglaterra que initiava uil longe serie de
                                                                             Those who report favorably on the whole            studios e reportos. Istos es summarisate in
                                                                                                                                gruppos secundo le paises de lor origine. Le
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                                                                          14 BOSE, S.: Rauwolfine: a new alkaloid of rau-              American Society for Pharmacology and
                                                                               wolfia serpentina benth. Part I. J. Indian              Experimental Therapeutics, Sept. 7, 1953,
                                                                               Chem. Soc. 1: 47, 1954.                                 New Haven, Conn.
                                                                          15 RAUJWOLFIA SERPENTINA (Editorial). Bull., Cal-       31 DASGUPTA, S. R., RAY, G. K., Roy, P. K. AND
                                                                               cutta School Tropic. 1\Ied. 1: 22, 1954.                WERNER, G.: The sympathicolytic activity of
                                                                          16 CAPTAIN, R.: Study of an indigenous root product          rauwolfia serpentina (Benth). Indian J. M.
                                                                                of rauwolfia serpentina its manufacturing              Sc. 7: 229, 1953.
                                                                                and standardizing procedure. Personal com-        32     AND WERNER, G.: Inhibition of vasomotor
                                                                                munication.                                            reflexes by ajamaline. Bull., Calcutta School
                                                                          17 CHAKRAVARTY, iI. D.: Note on the pharmacologi-            Tropic. M\led. 1: 16, 1954.
                                                                               cal action of rauwolscine. Science and Culture     33 , RAY, G. K., Roy, P. K. AND WERNER, G.:
                                                                               (India) 7: 458, 1952.                                    The sympathicolytic activity of rauwolfia ser-
                                                                          18 CHAKRAVARTY, N. K., GUPTA, J. C., Bosi:, S.                pentina Benth. Indian J. M\1. Sc. 7: 229, 1953.
                                                                                AND CHOPRA, I. C.: Hypnotic effect of iauwolfia   34DATTA, S. C.: Pharmacognostic studies on com-
                                                                                serpentina: the principle underlying this ac-          mercial varieties of roots of rauwolfia. Indian
                                                                                tion, its probable nature. Indian J. M. Res.           J. Pharmacol. 11: 105, 1949.
                                                                                31: 71, 1943.                                     31 DAVIS, L., TANTURI, C. A. AND TARKINGTON, J.
                                                                          19 CHATTERJEE, A.: Progress in the Chemistry of              A.: Combination of svmpathectomv and
                                                                               Organic Natural Products. Vienna, Springer              thiocyanates in the treatment of experimental
                                                                               1953, vol. 10.                                          and essential, or high diastolic hypertensiorn
                                                                          20 -: The alkaloids of rauwolfia canneseens linn.            Ann. Surg. 132: 394, 1950.
                                                                                Part I. J. Indian Chem. Soc. 18: 33, 1941,        36 DJERASSI, C., GERMAN, M., NAUSSBAUM, A. L.
                                                                                Part III. J. Indian Chem. Soc. 20: 11, 1943,           AND REYNOSO, J.: Alkaloid studies II-
                                                                                Part V. J. Indian Chem. Soc., 28: 29, 1951.            Isolation of reserpine and narcotine from
                                                                          21 CHATTERJEE, A. AND BOSE, S.: A new alkaloid               rauwolfia heterophylla Roem. and Schult. J.
                                                                               from the root of rauwolfia serpentina benth.            Am. Chem. Soc. 75: 5446, 1953.
                                                                               Science and Culture (India) 17: 139, 1951.         31 DORFMAN, L., HUEBNER, C. F., .\IACPHILLAMY,
                                                                          22 CHANDRA, V.: Vegetative propagation of rau-               H. B., SCHLITTLER, E. AND ST. ANDRE, A. F.:
                                                                               wolfia serpentina (Benth). J. Sc. Industry              On the constitution of reserpine from rauwolfia
                                                                               Research (India) 4:187,1954.                            serpentina. Experienta 9: 368, 1953.
                                                                          23 CHOPRA, R. N.: Rauwolfia Serpentina, Indige-         38 DOUTHWAITE, A. H.: (Letter to editor.) Lancet
                                                                               nous D)rugs of India. Calcutta, Art Press, 1933.         1: 1345, 1954.
                                                                          24   -,GUPTA,J. C. AND MIUKHERJEE, S. N.: The phar-     31 DOYLE, A. E. AND SMIRK, F. H.: Hypotensive
                                                                             macological action of an alkaloid obtained from           action of reserpine. Lancet 1: 1096, 1954.
                                                                             riauwolfia serpentinae Benth. A preliminary          40 DUTT, A., GUPTA, J. C., GHOSH, S. AND KAHALI,
                                                                             note. Indian J. M\. Res. 21: 261, 1933.                    B. S.: Rauwolfia serpentina 1)enth. Indian J.
                                                                          25  , DAS, N. N. AND AMUKHERJEE, S. N.: The                   Pharmacol. 9: 54, 1947.
                                                                             action of ajmaline on nerve impulses. Indian         41 DUTTA, R. J.: Rauwolfia serpentina alkaloids in
                                                                             J. M. Res. 24: 1125, 1937.                                 the treatment of hypertension. Patna J. Med.
                                                                          26    AND CHAKRAVARTY, M. D.: A preliminary                   28: 376, 1954.
                                                                             note on the pharmacological action of the            42 DYMOCK, W.: Vegetable _Materia M\ledica of
                                                                                                                           RUSTOM\ JAL VAKIL27                                              227
                                                                                    Western In(ia. Ed. 2, Londoin, Tribner & Co.,            alealoid cristallise. Bull sc. pharnmacol. 43: 364,
                                                                                    1885, P. 505.                                            1936.
                                                                              43 DYMiOCK, \W.: Ratuwolfia alkaloids. Pharmacol.         60    : Sur Un nouveau paralysant electif des vaso-
                                                                                    In(dica 2: 415, 1891.                                    constricteurs, adrenalineo sensible, l'ajmaline,
                                                                               44 EVANS, W. AND LOUGH.MAN, 0.: The drug treat-               alkaloide cirystallise de rauwolfia serpentina.
                                                                                    ment of hy-perpisial. Brit. Heart J. 1: 199,             Bull. Acad. nat. med. 115: 452, 1936.
                                                                                    1939.                                               61      Effects de l'extrait de rauwolfia heterophylla
                                                                              45 AND PARTRIDGE, M. MW.: The partition chro-                  roem et Schult. sur le pneumogastrique car-
                                                                                    matography of alkaloids. Pars I. Solanaceous             diaque. Compt. rend. Soc. de biol. 132: 213,1939.
                                                                                    alkaloids. Quart. J. Pharm. & Pharmacol.            62 -: Sur quelques proprietes physiologiques de la
                                                                                    21: 126, 1948.                                           serpentina, alcaloide crystallise dui rauwolfia
                                                                              46      The partition chromatography of alkaloids.             serpentina. Compt. rend. Soc. de biol. 134: 94,
                                                                                    Part IV-solanaceous alkaloids. Quart. J.                 1940.
                                                                                    Pharm. & Pharmacol. 4: 769, 1952.                   63 -: Effects intestinaux d'ajmaline Pure. Compt.
                                                                              41 FISHBERG, A. M.: Hypertension and Nephritis.                rencl. Soc. de biol. 134: 369, 1940.
                                                                                    Ed. 5, Philadelphia, Lea & Febiger, 1954.           64 -: Sur quelques proprietes physiologiques des
                                                                              48 FORD, R. V., LIVESAY, M. R., MIILLER, S. I. AND             alcaloides totaux des racines de rauwolfia
                                                                                    MIOYER, J. H.: Preliminary observations of               vomitoria. Compt. rend Soc. de biol. 138: 40,
                                                                                    rauwolfia serpentina therapy of hypertension.            1944.
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                                                                                    Me(1. Record 47: 608, 1953.                         65 HARTOG, J.: Die Wirkung von Rauwolfin auf das
                                                                              49 FORD, R. V. AND MOYER, J. H.: Rauwiloid-                    Heiz. Arch. internat. de pharmacodyn. et de
                                                                                    hexamethonium for hypertension. Am. Heart                therap. 51: 10, 1935.
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                                                                                                        Circulation. 1955;12:220-229
                                                                                                        doi: 10.1161/01.CIR.12.2.220
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