Posted over a year ago
I have had a sinus infection for the past 3 weeks. I finally went to the doctor, and was given the Z-Pak. I must admit it caused a little upset stomach and cramping with the first dosage, however today is day two of the single tablet dosage. I think with any antibiotics there may be the body getting use to the medication, I am glad to at last to start to feel better from being sick for so long.