The chemical nepetalactone is to credit for your kitty's crazy reaction to catnip. The chemical, which is a mild hallucinogen, doesn't affect humans in the same sense as we do not rely as heavily on our noses as cats do. In fact, it doesn't even affect all cats.
Finasteride is a drug that belongs to the class of androgen inhibitors, which means that it blocks the production of male sex hormones. It is sold in the United States and Canada under the brand names Proscar and Propecia.
Because finasteride has been effective in controlling male pattern hair loss, it has been used to treat female pattern hair loss, although it has not gained FDA approval for that purpose. Medication prescribed to treat a condition that does not have FDA approval for that use is known as off-label..