sinusitis
"I was prescribed Cephalexin for a 20 day course for a horrid sinus infection. I had a throbbing headache, lots of mucus, etc. but I wasn't feeling any better so I was prescribed Levaquin. Within the first three days of using Levaquin I felt incredibly tired; just weak, laying around all the time, and unable to sleep during the night. My eyes felt droopy all the time, I was dizzy standing up, my heart raced when I walked up the stairs, and finally on my fourth day taking the medicine I was startled. This had been going on for a couple days, but my head and left shoulder started twitching consistently. I literally could not keep them still. I got worried and called the doctor and was told to stop the drug. I guess it was too powerful for me!"