An anti-obesity drug, reliably giving you a hard-on, or horny wetness, maybe giving you smooth skin, making baldies hair grow back, rejuvenating in general, wit

An anti-obesity drug, reliably giving you a hard-on, or horny wetness, maybe giving you smooth skin, making baldies hair grow back, rejuvenating in general, without too much unwanted side effects, with the exception of needing ever more of that stuff, otherwise you're shriveling into some zomboid husk?