I normally get no affect with meds. tried a few types. the one that sort of works for me is gravol, usually by putting me to sleep. gives usually 30 mins of relative safety.
I know many wont believe it, I didnt for years either. but the hard candy with dried plum in it. taste nasty but sucking/chewing things helps greatly, at least for me. and those plum candies work far better than gum and regular sugar blobs.