Dr. Alien(1989)

She has the cure for growing pains!

When the mysterious and sexy Ms. Xenobia takes over the biology class at the local college, the dating life of supergeek Wesley Littlejohn takes a serious turn. Littlejohn agrees to be a lab rat for the professor's unusual vitamin research study. Now, thanks to some out-of-this-world supplements, he's been transformed into the campus stud. But Xenobia has ulterior extraterrestrial motives in this sci-fi sex comedy.