Ribavirin is an effective antiviral drug that is often prescribed in clinical practice and generally needs to be used under the supervision of a physician. Pregnant women, in particular, are not sufficiently aware of this antiviral drug, and after taking it can have significant effects on the body and fetus. The general effects of ribavirin on the fetus may be teratogenic and is contraindicated in pregnant women or women who are at risk of becoming pregnant. If ribavirin is taken, its elimination from the body is very slow, and it is usually not completely cleared from the body four weeks after discontinuation. Common adverse effects include anemia, fatigue, headache, insomnia, loss of appetite, nausea, vomiting, and possibly a decrease in red blood cells, white blood cells, and platelets and hemoglobin. So the effects of ribavirin on the fetus are very significant. Although the drug is used to treat viral diseases, it can cause harm to people’s immune system, especially to pregnant women and fetal development, so it is generally prohibited.