Ribavirin used for nebulization before pregnancy has an effect on pregnancy. Ribavirin is an antiviral drug, the drug has a strong teratogenic effect, clinical studies have shown that 4 weeks after stopping the drug can still be detected in the body of a certain concentration of the drug, although nebulization of ribavirin’s main site of action is the respiratory tract, but still a small amount of the drug can enter the patient’s bloodstream circulation, so the nebulization of ribavirin before pregnancy has an impact on pregnancy. Ribavirin may cause birth defects, miscarriage or stillbirth. To avoid ribavirin affecting the fetus, female patients should avoid pregnancy during treatment with ribavirin and for 9 months after stopping the drug, and female partners of male patients treated with ribavirin should avoid pregnancy for 6 months. If a woman is preparing for pregnancy and has a need for medication, she should be under the guidance of a medical professional, so as to avoid improper use of medication, which may lead to adverse consequences.