Azithromycin is not taken for 4 days and stopped for a few days, but is divided into therapies; for azithromycin 5-day therapy, it is taken for 5 days and stopped for 4 days, and in the case of azithromycin 3-day therapy, it is taken for 3 days and stopped for 4 days. Azithromycin has a relatively long half-life of more than 60 hours in tissues. Therefore, even after Azithromycin is stopped, it can still work in the body for at least 3 to 4 days. And Azithromycin has a post-antibiotic effect, even after the drug concentration is decreased or eliminated, the growth of bacteria can still be continuously inhibited. Azithromycin has some adverse effects, the most common of which are gastrointestinal reactions, such as vomiting and abdominal pain. Azithromycin is primarily metabolized by the liver and may affect hepatic function during use, requiring monitoring for changes in liver function. Azithromycin is contraindicated in people who are allergic to macrolides and should be taken under the guidance of a specialist.