It's 2:47 AM and I can't sleep, have been taking this horrible drug for 4 days for a sinus infection. I have constant drainage in the back of my throat and a bitter taste in my mouth. Insomnia and when I finally sleep, nightmares and crazy dreams. The prescription just went in the trash can, I would rather have a sinus infection than to deal with this. I couldn't understand why I felt this way until I found your website. Thanks so much, never will I take this again.