its not good to quit any of these medications cold turkey. titrate down slowly to avoid side effects or other complications . some such as anti seizure medications, ( gabapentin, lyrica) can actually cause seizures if not titrated down.

as far as aspiration pnuemonia is concerned, you will know that you are developing it due to wheezing, coughing, chest pain, rapid breathing etc. unless you develop those symptoms i would try to relax about it as much as possible and move on. if you start to get sick, then you deal with whatever comes up when it comes up.