The cobras used in this movie had to be milked of their venom in order to make them less dangerous.
"When I first read the script, I thought, 'Whoever wrote this is either gay, or hasn't had a good time with a woman lately,'" star Marlene Clark recalled in an interview in 2000. "You make love [to the cobra woman], and when you wake up, you're old and you die? What an awful vision of women! I decided that I wasn't going to think about the Freudian meaning. I was just gonna take the check and play a woman who turns into a snake. The whole thing was strange right from the start. I mean, they brought me to the Philippines to play a Filipino! Now, please, I want somebody to explain this to me, because I've never understood that!" She then joked that it must have been because "all the Filipino actresses were too smart to walk into a room full of cobras."
Shot back-to-back with the better-known Savage Sisters (1974).