Only erythromycin and azithromycin are effective for mycoplasma infections. Cephalosporins are effective at the beginning, but later the effect is getting worse. Azithromycin usage: over 3 years old, azithromycin need to eat three three days, in the middle of the interval of 4 days; 1-3 years old, you can eat two three days, in the middle of the interval of 4 days; less than a year old, for the sake of safety as far as possible need to use erythromycin treatment, the course of treatment is not shorter than 1 week. If it is mycoplasma pneumonia should follow the doctor’s advice can consider intravenous azithromycin or erythromycin.