Caffeine pills are OTC here, not there?

I prefer them to coffee since coffee has other substances too with side effects and the pills are more pure.

Almost everyone with ADHD I know self medicates with coffee. One started at 5 years old drinking from forgotten half empty cold cups or a sip here and there when the adults look away.

My mom is possibly ADD and she has to have coffee, she can't function without. It makes her focused AND calms her so she drinks half a cup before sleep or she can't sleep.