Hi I have been on clarithromycin for about two weeks for a sinus infection. I have been noticing a flutter in my chest, like my heart is skipping a beat. I ve been ignoring it, b/c I can allow stress to impact me negatively. Guess I ve noticed this symptom on and off for a week or so. I continue to work out, notice nothing odd in my viceroys cardio. While resting my heart rate is up a noticeable amount. I ve decided to stop taking this JUST NOW b/c the skipping heart beat was worrying me. I really think this is from the medication, but how many days for side effects to subside? As in, if I notice NO heart Fluttering one day, two days, a week to go away if this is on fact the cause?
Dear Friend. Welcome to Chat Doctor. I am Chat Doctor.  I have read your query in detail. Furthermore, I understand your concern. Yes, Azithromycin and Azithromycin can cause this. So, I would advise you to follow:1. To ask your doctor for a suitable alternative2. To stop Clarithromycin3. To get ECG.ECG is important to rule out any other pathology that can cause this. If this is due to Azithromycin, this should stop with in 72 hours. This is my best advice for you based on available details. If you have any further query please ask me. Stay Healthy. ChatDoctor, MD