Benzonatate
"I got checked by the Urgent clinic today who were very helpful. Upon being diagnosed with Bronchitis I was prescribed the 100mg Tessalon. I SPECIFICALLY asked the doctor if this would make me drowsy, because I am a teacher and have to return to work ASAP. Nope, he assured. Well, not only did I spend the rest of the evening hiding from lights and sounds due to an explosive headache (which ached every time I coughed) but my temp went up and I am now extremely exhausted. What is the deal with this stuff?? I haven't stopped coughing and feel ten times worse."