Macho e Fêmea (1974)

Juliano is a millionaire who leads a boring life amidst the facilities that money provides him. One day, he decides to change his routine and associates with a mad scientist, Professor Kunz, who invents a magic potion, a drug that releases the other side of the personality of those who consume it. Juliano becomes a guinea pig and tries the potion, transforming into the beautiful Juliana (Vera Fischer). However, the effects of the new drug will cause many confusions between the millionaire and the crazy professor, creating complicated situations for both of them.