Tadalafil tablets are usually effective after 30 minutes after taking, which needs to be judged according to the individual’s absorption, and should be used correctly according to the dosage under the guidance of the doctor. Tadalafil tablets are used to treat erectile function in men, is a long-acting phosphodiesterase type 5 inhibitor, can maintain better erection hardness and erection time after taking. The drug usually works 30 minutes after taking it, although sexual stimulation is required for it to work; it does not work without sexual stimulation, and the exact time it takes for it to work varies depending on the individual’s constitution. The use of tadalafil may cause adverse reactions such as headache, back pain, and indigestion. Tadalafil is contraindicated in people who are allergic to any of the ingredients in the product, patients who are taking any form of nitrates, guanylate cyclase stimulators, women, children and other people. The medication should be taken correctly and in the correct dosage under the guidance of a doctor to avoid unauthorized use and damage to the body.