Homeopathy

Such as the treatment of ADHD (where previously i don't think drugs were ever prescribed).

i have no idea of the history of treatment or recognisation of ADHD or other mental illnesses but drugs probably weren't prescribed because they didn't exist.

don't forget how far psychiatry has come in the last 100 years, from locking people up, torture, electric shock treatment, lobotomys, to actual understanding and effective drugs and other psychological treatments (e.g. cognitive-behavioural therapy).

and don't forget how far drug development has come, from just trying things willy-nilly to identifying a specific problem with the brain, and designing drugs to combat that problem (e.g. SSRI's, SNRI's)

and doctors do probably prescribe drugs where other treatments would be more effective (e.g. SSRI's instead of CBT in the case of depression) but why is this a bad thing? these people willingly decide to take them to help alleviate their symptoms, and in most cases it is a useful stop-gap until they can talk to a therapist.

if you're suggesting that patients should not have the option of drugs, or are too stupid to say no, i don't see what your mandate is to decide what drugs other people take, especially when a few pills costs a lot less than training enough psychiatrists and psychologists so that there are no waiting lists.