Taking azithromycin stomach pain usually lasts 24 to 72 hours, if beyond then other diseases can not be ruled out caused. One of the adverse reactions of azithromycin is gastrointestinal symptoms, including abdominal pain, diarrhea, nausea and vomiting, etc., subject to azithromycin itself has a relatively long half-life, so such symptoms can last for about 24 to 72 hours, according to the influence of different physical and other factors may be slightly changed. But if more than 72 hours, the gastrointestinal adverse reaction is still relief is not obvious, then do not rule out the possibility of other diseases, such as gastroenteritis, appendicitis, etc., at this time you need to consult a doctor in a timely manner, for a comprehensive examination, including blood routine, etc., in accordance with the doctor’s instructions for symptomatic treatment can be.