Benzonatate
"I was diagnosed with bronchitis and was prescribed 100mg dosage. At my pharmacist's suggestion I started off by taking 200mg. This medication had no effect on my cough whatsoever. I think it belongs in the placebo aisle. Robitussin with codeine actually works, but when I asked my doctor for it he substituted this worthless concoction. When I got to the pharmacy they were actually out of this junk and refused to call my physician and offer a substitute. Instead, they called pharmacies around town and sent me to a competitor to get this stuff. It appears the Benzonatate sales force has a lock on both the doctors and pharmacists. I wish I had known how ineffective this stuff is on coughs before I went to the pharmacy."