For me it was DIET PILLS that contained amphetamines. Prescribed by my doctor to lose weight. About 5 decades ago. They were VERY EFFECTIVE but also addictive and when he stopped renewing the prescription I CRASHED. Ever CRASH? It is a miserable feeling. It took about two weeks to get that crap outta my system and ever since then I HATE TAKING PILLS and don't unless I am in such dire pain my brain shuts down. SIGH. Terrible experience. I do not recommend addiction to anyone.