The correct drug name for tadalafil is tadalafil tablets and the generic drug name for Viagra is sildenafil citrate tablets. Both treat erectile dysfunction, tadalafil tablets have a slower onset of action than sildenafil citrate tablets, but the duration of action is longer than sildenafil citrate tablets, so it is not possible to make a simple comparison of which is better.
Tadalafil tablets and sildenafil citrate tablets are both used to treat erectile dysfunction, from the point of view of drug onset of action, tadalafil tablets have a slower onset of action than sildenafil citrate tablets. However, tadalafil tablets effect duration is generally longer than sildenafil citrate tablets. So, both have some benefits and it is not scientific to simply say which one is better.
Tadalafil tablets and sildenafil citrate tablets have little difference in contraindications, adverse reactions, etc. Both are unsuitable for people taking guanylate cyclase agonists, allergic to the ingredients, etc., and both may have adverse reactions such as headache, indigestion, etc., so you should read the instruction manual carefully before use in case of mistakes. In addition, it is recommended to use medicines that are suitable for you under the guidance of your doctor.