How to easily remember things!?

[ TW: (minor) mentions of injuries and blood ]

HELP!! Okay, so remembering things has always been my weakness. Especially during tests, which is why I struggle alot. BUT THAT'S NOT THE POINT! The point is I'm in my school's teen red cross team. (A team of teenage medical first respondents basically). And I have trouble remembering the correct medicine for different sicknesses! Like, I remember the names of some like domperidon and antihistamine BUT I STRUGGLE TO REMEMBER WHAT THEY'RE USED FOR-

I'm okay with helping people with physical injuries like broken bones or bleedings etc, but if someone were to have a bad flu and need medicine for it, they'd die before I figure out what medicine and dose they need.

Any tips on how I'm able to remember it? (Yes, I have a skill issue) 🥹