Azithromycin is taken for three days and stopped for four days, because after three days of medication, the bacteriostatic concentration will continue to be maintained in the tissues for four days, and then continue to use it may be resistant to the drug or side effects. The reason why azithromycin is taken for three days and stopped for four days is because azithromycin has a long half-life, and after three days of continuous use, the blood concentration in the body has already reached the bacterial inhibitory concentration, and this blood concentration will last for more than four days. Even if you stop using azithromycin for four days after three days, the amount of drug in the body can completely inhibit the role of pathogenic bacteria. However, if you continue to use the drug, the effect will not be significantly enhanced, while the side effects will increase or the emergence of drug resistance, so you can suspend taking. Azithromycin is a macrolide antibiotic, which can be used for infections caused by sensitive bacteria, such as Mycoplasma pneumoniae infection, Staphylococcus aureus infection, Chlamydia trachomatis infection and other causes of upper respiratory tract infections, which can be treated with azithromycin. Azithromycin is available as an oral medication or as an intravenous infusion, and the specific method of use and dosage should be adjusted according to the severity of the patient’s condition and age. When using azithromycin, it is generally recommended to use three days and stop for four days, if nausea, vomiting and other adverse reactions occur during the use of drugs, you can take some symptomatic treatment of drugs. The use of this product is contraindicated in patients who are allergic to azithromycin, erythromycin, other macrolide or ketolactone antibiotics, or any excipients. Drug treatment, it is recommended to follow the doctor’s instructions, to avoid self-medication to produce adverse reactions.