Elidel is the trade name, generic name is vardenafil hydrochloride tablets, there is no comparative study of the efficacy of the two conclusions, and the specific effect varies from person to person, it can not be asserted that which can make the penis erection harder. Vardenafil hydrochloride tablets and tadalafil tablets belong to the same class of phosphodiesterase type 5 inhibitors, and are both indicated for the treatment of erectile dysfunction in men over 18 years of age. The theoretical duration of action of vardenafil hydrochloride tablets is shorter (approximately 12 hours) than that of tadalafil tablets (approximately 36 hours), but this does not mean that the absolute hardness of the erection is better. There are no authoritative statistics comparing the efficacy of the two drugs, and the specific efficacy of the drug may vary depending on the user’s physical condition, the severity of the disease, other interventions, and other factors. Therefore, it should not be assumed that vardenafil hydrochloride tablets will result in a harder erection than tadalafil tablets. It should also be noted that tadalafil tablets are contraindicated in people who are allergic to it or are using nitrate drugs (such as nitroglycerin), and headache, dyspepsia and other adverse reactions may occur during the process of using the drug; vardenafil hydrochloride tablets are also contraindicated in the presence of a recent history of stroke or cardiac infarction, severe hepatic impairment, hypotension and other conditions, and the adverse reactions are the same as those above. To sum up, those who are diagnosed with erectile dysfunction must choose and standardize the use of therapeutic drugs under the guidance of a doctor and according to the actual situation of the individual, and must not blindly use drugs or increase or decrease the dosage of drugs on their own, so as not to cause adverse consequences.