Dr. Jekyll and Ms. Hyde (1995)

Dr. Richard Jacks is a creator of perfumes. His girlfriend, Sarah, sometimes gets pushed to the side, but he loves her. One day, he discovers that his great-grandfather, Dr. Jekyll, was a scientist with a secret: a revolutionary discovery. He tries to follow in his footsteps and creates perfumes, each greater than the next. But one gives him more than he bargained for. He is transformed into a buxom bombshell, Helen Hyde. She is a powerhouse and a woman with a plan. The catch is, Richard doesn't know she exists. As he finds himself in situations each more ridiculous than the last, he becomes aware of Helen and makes a plan to get rid of her once and for all. But her career is growing. She won't go without a fight.