amoxicillin

It's the eighth most commonly prescribed drug in the U.S., with 52.3 million prescriptions written for it every year - many in winter for hacking coughs and suspected respiratory infections.

Pounding headache, congestion, runny nose, cough -- all symptoms of a sinus infection. If you take an antibiotic, the infection will be over in seven days. Take over-the-counter medication and wait out the symptoms, and it will be over in a week.