Ciprofloxacin
"I had a very bad sinus infection and was treated with Bactrim. That didn't work so my ENT prescribed Cipro. Yes, it's a strong drug but within 2 days I felt better. And let me tell you, I was very sick. I don't have any side effects yet, it's been four days (2x day). I want to recommend to folks who are looking at everyone's comments that most people who have had good experience with this drug don't post anything. So make your own decisions and don't be dissuaded from trying this drug."