Tadalafil tablets usually have no dependence, but some patients can experience certain side effects after using the drug. Tadalafil is mainly used clinically for the treatment of erectile dysfunction in men, and after its application, there is basically no dependence. Common side effects of the drug include headache, dyspepsia, nasopharyngitis, flushing, nasal congestion, urinary tract infection, influenza, etc. Known allergy to this drug should not be applied; during the application of nitrate drugs and guanylate cyclase agonist drugs, should not be applied. Patients with cardiovascular and cerebrovascular diseases, hepatic and renal insufficiency and those who have recently experienced myocardial infarction, arrhythmia and other conditions should be applied with caution. After application, abnormal erections, or eye reactions and hearing loss should be treated by a doctor as soon as possible. If this drug is to be used, it is important to follow the doctor’s instructions and to seek medical attention as soon as possible if any of the above adverse reactions occur after use of the drug.