Bruh you don’t even need a doctor to buy nicotine or caffeine. The indications for uppers vary depending on what you’re trying to achieve in what part of the body and how.

For ADHD there’s various types of amphetamines and also some things aren’t actual stimulants but can act similarly like SNRIs. For just specific types of narcolepsy there’s modafinil. For obesity there’s phentermine. For unclogging your sinuses there’s pseudoephedrine, but that’s OTC in a lot of places. I was recently chatting to one of the pharmacy techs who says they apparently actually do stock cocaine. Apparently it’s in some kind of nasal jet device that she’s pretty sure is used to stop a severe nosebleed. They can also just put literal adrenaline or noradrenaline into you to various goals (usually cardiovascular).

One of my coworkers came to psych out of the ICU and sometimes we’ll be looking at a blood pressure and I’m like ‘well you’re the ICU nurse what do we do with this’ and she’s like ‘fuck if I know I don’t have an IV for levo!’ Man fuck IVs actually she’s always on about the PICCs. She hardly even knows how to do a straight stick them ICU nurses are spoilt.