The concentration of amoxicillin in breast milk is usually not high 12 hours after administration. The half-life time of amoxicillin is very short, so the general dosing recommendation is 6 to 8 hours. Twelve hours after taking amoxicillin, the concentration of amoxicillin in a woman’s body is already low, and accordingly the concentration of the drug in breast milk is also low. Amoxicillin is relatively small side effects of drugs, pregnancy or breastfeeding in the necessary, under the guidance of a doctor can be appropriate to use, generally will not be recommended to take amoxicillin after termination of breastfeeding, that is to say, although amoxicillin can be through the breast milk into the fetus body, but relatively speaking, the impact on the fetus is small. The use of medication should be carried out under the guidance of a doctor, and should not be used blindly, so as to avoid adverse effects.