Tadalafil tablets can treat penile erectile dysfunction, clinical efficacy is generally good, but there are headache, indigestion and other adverse reactions, allergic to the ingredients, taking nitrate drugs and other people are prohibited to use. Tadalafil tablets are mainly used for the treatment of erectile dysfunction in men, taking the drug requires sexual stimulation to be effective, can maintain the hardness of penile erection during sex, and improve the quality of sexual life. However, taking this drug may also cause adverse reactions, common headache, dyspepsia, increased heart rate, flushing, some individual patients have allergies, dizziness and so on. It is also important to note that tadalafil is contraindicated in people who are allergic to the components of this drug; it is contraindicated during the administration of nitrate drugs; tadalafil is contraindicated in patients who are taking any form of guanylate cyclase stimulant, women, children and other groups of people. Patients with erectile dysfunction should seek medical treatment as soon as possible, and the drug should be used under medical supervision.