Do you have anything for airsickness? 你们有晕机药吗？
Do you have anything for headache? 你们有头痛药吗？

carsickness
seasickness
Do you have anything for ….?
止痛药：Aspirin, Paracetamol
I’m allergic to Aspirin. 我对阿斯匹林过敏
I’m allergic to … 对....过敏