My Wife Has Parkinson Disease And Now Has A Bacterial

my wife has parkinson disease and now has a bacterial infection and the first meds she was on was biaxin 2 x a day 500 mg and caused very bad side effects that doctor went on vacation and the covering doctor prescrieed sulfamethoxaz-ole tmp ds whic has some of the side effects bas the biaxim.. my question is does the second med work with parkinson meds