Ribavirin Granules taken on the 35th day of pregnancy may cause birth defects, miscarriage or stillbirth of the fetus. Ribavirin granules belong to the antiviral drugs, its main ingredient is ribavirin, clinically used for the treatment of viral pneumonia and bronchitis caused by respiratory syncytial virus, skin herpesvirus infection of the disease. The most significant toxicity of ribavirin granules is hemolytic anemia, with a decrease in hemoglobin occurring within the first 1-2 weeks after oral treatment. General systemic adverse reactions include fatigue, headache, weakness, malaise, chest pain, fever, chills, and flu symptoms. The drug is teratogenic and is contraindicated in pregnant women. If you take ribavirin granules on the 35th day of pregnancy, you need to stop the medication immediately and go to the hospital for a checkup to determine the next steps based on the results. Medication during pregnancy should be used in accordance with medical advice to avoid adverse effects.