There are no definitive studies showing that Zidaxan affects menstruation, so Zidaxan can be given during menstruation. Zidaxan is Thymofaxine for Injection, the main ingredient of which is Thymopeptide a1, a polypeptide consisting of 28 amino acids with the N-terminal serine acetylated. The excipient contains 50 mg of mannitol and appropriate amount of sodium phosphate. It is mainly used in chronic hepatitis B and as a vaccine booster for immuno-compromised patients, those with suppressed immune system function. Its adverse effects are mainly pain at the injection site. Rarely, there is erythema, transient muscle atrophy, polyarthralgia with edema, and rash. This product is contraindicated in those patients with a history of hypersensitivity to Ta1 or any adult within the injection. Because treatment with this product works by boosting the patient’s immune system, it is contraindicated in patients who are intentionally immunosuppressed, such as organ transplant recipients. It should be used with caution in pregnant and lactating women and children. It is recommended to go to the hospital for treatment and medication under the guidance of a professional physician, and not to take medication on your own, so as not to delay the condition and affect the recovery of the disease.