My meds make me stupid

Ok when I’m on them I feel fine, but when I’m doing work and it wears off I turn into an absolute idiot. Maybe the comedown/crash is like the opposite effect because I feel so Danm slow and destracted once they wear off.

I’ll always know when they wear off because I’ll suddenly get stuck on the problems I was breezing through before and make stupid mistakes. Is this a common experience?