I received Zithromax for bronchitis in the form of a 3-day treatment. Already a few hours after the first tablet I noticed an improvement. After the first day of taking it, I felt much better and my state of health was no longer comparable to the days before. The only thing that was a bit uncomfortable was vomiting, which only happened 3 times and about 2-3 hours after taking the pill. After the 3-day treatment, my symptoms were almost gone.