Vardenafil and tadalafil are both used in the treatment of erectile dysfunction, but there is no definitive conclusion on their efficacy, and it is impossible to say which one can make the erection harder.
Vardenafil and tadalafil are both phosphodiesterase type 5 inhibitors, and are both indicated for the treatment of erectile dysfunction in men. The theoretical duration of efficacy of tadalafil is slightly longer (about 36 hours) than that of vardenafil (about 12 hours), but this does not represent the absolute hardness of an erection that can be achieved.
There are no authoritative studies comparing the efficacy of vardenafil and tadalafil, and the specific efficacy of the medication may vary depending on the individual’s physical condition, timing and compliance with treatment, and severity of the disease. Therefore, it cannot be presumed that any drug can make the erection harder.
It should also be noted that tadalafil is contraindicated in people who are allergic to it or are using nitrate drugs (such as isosorbide mononitrate), and headache, flushing and other adverse reactions may occur during the process of using the drug; vardenafil, in addition to the contraindications mentioned above, is also contraindicated in the presence of severe hepatic impairment, low blood pressure, recent history of stroke or cardiac infarction, and the adverse effects of the same as above.
In conclusion, the diagnosis of erectile dysfunction must be under the guidance of a doctor, according to the actual situation of the individual choice of treatment drugs and standardized use, do not blindly use drugs or increase or decrease the dosage of drugs, so as not to cause adverse consequences.