Tadalafil is commonly available in tablet form and is usually taken orally before sexual intercourse with a recommended starting dose of 10mg. The main ingredient of tadalafil is tadalafil, which can be used to treat erectile dysfunction, and erectile dysfunction combined with the signs and symptoms of benign prostatic hyperplasia. Taking tadalafil tablets is not affected by diet, so they can be taken before or after meals, usually before sex, and sexual stimulation is required for the drug to take effect after taking it. The recommended starting dose for most patients is 10mg, which can be increased to 20mg or decreased to 5mg at a later stage, depending on individual efficacy and tolerability. It should be noted that the adverse effects of tadalafil include headache, dyspepsia, back pain, myalgia, etc. Tadalafil is strictly contraindicated if nitrates are being taken during this period, or if the patient is allergic to tadalafil. This is an oral drug, usually taken before sex, but you need to use the drug under the guidance of a doctor, you can not take the drug without authorization, to avoid affecting your health.