Impotence is also known as erectile dysfunction, and the main medicines that patients can take are sildenafil, tadalafil and testosterone undecanoate gel pills. 1. Sildenafil: It can play a role in vasodilating effect and relieve erectile dysfunction. It is prohibited to use if the patient is allergic to the product or has severe liver function impairment. Adverse reactions such as angina pectoris, gout and nasal congestion may occur after using the drug. 2. Tadalafil: It can be used to treat erectile dysfunction in men, but it requires sexual stimulation to be effective. It is contraindicated in patients who are allergic to the product, under 18 years of age, and so on. Common adverse reactions include headache, nausea, indigestion, back pain, and respiratory infections. 3. Testosterone Undecanoate Gum Pills: It can be used to treat erectile dysfunction due to low androgen levels, and supplementation with androgens may improve erectile function. Adverse reactions include nausea, diarrhea, depression, and muscle pain. This drug is contraindicated in patients who are allergic to the product, suspected of having prostate cancer, etc. It is recommended that patients with erectile dysfunction seek medical attention in a timely manner, the drug can not be used without authorization, you need to strictly follow the doctor’s instructions to use the drug.