Anbao tablets, also known as ritodrine hydrochloride tablets, can inhibit contractions to reduce preterm labor, usually taken until about 8 months of pregnancy can be discontinued, the specific need to comply with the doctor’s instructions, as long as the doctor believes that it is necessary to extend the duration of pregnancy, you can continue to take oral medication. Ritodrine hydrochloride tablets are the main drugs commonly used in clinical practice to inhibit uterine contractions, which can effectively inhibit the frequency and intensity of uterine smooth muscle contractions, reducing or preventing the risk of preterm labor at 20 weeks’ gestation and placental abruption. Generally, depending on the degree of control of contractions after treatment, it is recommended that Ritodrine Hydrochloride Tablets can be used up to the eighth month of pregnancy, i.e., discontinued around 32 weeks. Due to the presence of adverse effects such as cardiac arrhythmia, impairment of liver function, thrombocytopenia, rhabdomyolysis, etc., the drug should be administered and discontinued under the supervision of a physician.