Pregnant women can use propylthiouracil tablets under the supervision of a physician, but they must be used with caution. Propylthiouracil is a kind of antithyroid drug, with the effect of inhibiting the synthesis of thyroxine, can be used for the treatment of various types of adult hyperthyroidism; although in the instruction manual, does not specify that pregnant women are contraindications to propylthiouracil tablets, but pregnant women must be careful to use the drug, even if the use of the drug must be done in strict compliance with medical advice. The use of propylthiouracil tablets may cause some adverse reactions, common arthralgia, headache, dizziness, gastrointestinal tract reactions, lymph node enlargement and so on. The drug is contraindicated in people with severe leukocyte deficiency, severe hepatic impairment, allergy to the drug, and breastfeeding women. During the treatment with propylthiouracil tablets, it is necessary to pay attention to the regular examination of blood and liver function. In addition, people with abnormal liver function and peripheral blood leukocytes need to use the drug with caution. Pregnant women should be evaluated by a medical professional before using Prothiopyrim Tablets, and should never abuse the drug.