Benzonatate
"I was prescribed this medication for a post nasal drip I've had for several weeks. I hate it. It only lasts 2-3 hrs the first couple times you take it, then it only lasts maybe an hour, now I'm up coughing worse than before, googling if I can take more than prescribed. Do not do that. I have 200 mg 3 x as needed. I have a terrible headache and my ribs are killing me. On top of that I pee a little every time I cough which is just wonderful seeing I have to work tomorrow. I'm discontinuing and calling my doc first thing in the morning."