Azithromycin 5-day therapy is taken for five days and then stopped for four days, or in the case of Azithromycin 3-day therapy, taken for three days and stopped for four days. Azithromycin is a drug with relatively strong antimicrobial activity, and the significant difference with other antibacterial drugs is that the half-life of this drug is generally long, and oral or intravenous drip can contribute to the half-life of the drug concentration in the bloodstream for 35 to 48 hours. Because azithromycin has a post-antibiotic effect, the therapeutic effects of the drug can be maintained for a period of time even after the drug has been stopped, so it is possible to stop taking the drug for a period of time. Adverse effects of azithromycin include nausea, vomiting, anorexia, diarrhea, loose stools, and dyspepsia, etc. Azithromycin is contraindicated in people who are allergic to azithromycin and macrolides. In addition, Azithromycin carries certain risks and patients need to be guided by a specialist.