Viagra generally refers to sildenafil citrate tablets. Occasionally taking a tablet every other day is not harmful to the body, but long-term consumption may be harmful. Sildenafil citrate tablets are mainly used for the treatment of erectile dysfunctionPatients who occasionally take a tablet every other day are generally not harmful to the body, but if patients take a tablet of sildenafil citrate every other day for a long time it may be harmful to the body. Patients taking this product for a long period of time may increase adverse reactions, causing patients to experience migraine, flushing, facial edema, vomiting and so on. The drug is contraindicated in people who are allergic to sildenafil citrate tablets to prevent allergic symptoms such as difficulty in breathing and itchy skin. In addition, patients with low blood pressure, high blood pressure and heart failure should not take Sildenafil Citrate Tablet to avoid aggravating the condition. This product should not be taken for a long time, the drug needs to be taken under the guidance of a doctor, and should not be used blindly on its own.