Vidalista you mean tadalafil for erectile dysfunction, the choice is mainly about dose and how often you want to use it: Vidalista 10 mg: a reasonable usual starting strength when taking tadalafil as needed. The standard starting dose is 10 mg. D DailyMed Vidalista 20 mg: generally used if 10 mg isn't effective and is tolerated; it isn't necessarily "better" and can cause more side effects. D DailyMed Vidalista 5 mg: can be useful for daily use or if 10 mg produces troublesome side effects. Daily tadalafil for ED typically starts at 2.5 mg and may be increased to 5 mg. D DailyMed For as-needed use, don't take tadalafil more than once in 24 hours. Its effects can last up to about 36 hours. D DailyMed Important: Don't combine Vidalista/tadalafil with Cenforce/sildenafil or other ED medicines, and don't use tadalafil with nitrate medicines such as nitroglycerin because of the risk of a dangerous drop in blood pressure. D DailyMed If you tell me your age, whether you've used sildenafil/Cenforce before, and what strength of Vidalista you're considering (5/10/20 mg), I can help you choose the safer option.