There is no data to support the idea that tadalafil for impotence is a treatment that can achieve recovery through dosage reduction. Impotence is defined as erectile dysfunction. Tadalafil is a long-acting PDE5 inhibitor for the treatment of erectile dysfunction in men. The recommended dosage of this product is 10mg, taken before engaging in sexual intercourse, independent of food intake. If taking 10mg is not effective, you can take 20mg. it can be taken at least 30 minutes before sexual intercourse. The maximum frequency of dosing is once daily. There are no data clarifying that restoration of normal erectile function can be achieved by dose reduction in the treatment of erectile dysfunction with tadalafil. Tadalafil is associated with adverse reactions such as eyelid swelling, eye pain and conjunctival congestion. 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 and children. Patients with erectile dysfunction are advised to go to the hospital for treatment under professional medical supervision. Tadalafil is recommended to be used under the guidance of a doctor to avoid unauthorized use of the drug.