Shrugs, not doing your best could be self-sabotaging. Simply-not-liking-school that much (that's how Venus never gotten straigh As... since 3rd grade).

As for meds... stimulants help everybody. That's why pilots used them in WWII. That's why militaries still use them. That's why students lie to get them. That's why managers nom on them en masse... and as somebody who gotten through her studies on OTC stimulants... I am not gonna judge. But they are not good for your body. So if it's only "I am not getting straight As on Uni"... I would think twice between using legal speed. It's not moral judgement... but something to consider. I know forgeting keys is considered ADHD these days... but meh. I wish it was okay to admit that it's perfectly fine not to have straight As. It pains me to see people killing themselves over grades. (mom always acted like grades were the world. Nobody ever asked me about grades in life. Nor were my friends asked and some work on high positions...).