Benzonatate
"I was having very bad drainage, kept coughing nonstop, nasal drip, no energy, and headache. I went to the doctor and was prescribed Sudafed,amoxicillin,and this. The Sudafed and the amoxicillin  have worked but this not at all. I am still coughing and if anything I think it's gotten worse.  I can't sleep because I am coughing so bad and I am noworking to the point where coughing has turned my throat red. This may work for some but has not done ANYTHING for me. I wasted $29 on a prescription that doesn't work. Not happy."