Children should take azithromycin for 1-3 weeks for bronchitis, if there is a clinically clear mycoplasma infection or the titer of the antibody shows a 4-fold increase in potency, then azithromycin should be used for 3 weeks, and the general bronchitis dosing time of 1-2 weeks is enough. Azithromycin is a macrolide antibiotic, in addition to the effect of the antibiotic itself there are effects other than antibiotics, this effect is called anti non-specific inflammatory effect. For children with allergies, azithromycin has an anti-allergic inflammatory effect and should be preferred. It can be stopped after 1 week of use for babies with bronchitis when the symptoms subside. If the situation is only getting better but not completely gone you can take it for 1 more week until the symptoms of coughing are completely gone.