> You take a dose every two weeks

Weekly, if you are following guidelines correctly. The half-life of most GLP1 peptides is 5-6 days.

I otherwise agree with your point entirely. Though anecdotally, I may have given my brother-in-law a single small vial of tirzepatide at his request so that he could experience it, and the results were ... not good. Turns out he's an idiot, thought that 'more is better', 'drinking enough water is for weenies', and 'I am not an alcoholic even though I get plowed most evenings.' All against my very specific advice on how to give it a try. Whoops.

My fault, yes, I should have realized he was too stupid to do it without adult supervision. He made himself so sick he almost went to the ER. Nothing really dangerous, of course, tirzepatide is pretty safe stuff, but overdosing on it can make you feel very shitty for a few days until the blood concentration drops.