Vidalista Professional 20 mg, it contains 20 mg tadalafil in a sublingual formulation. The manufacturer lists it as a 20 mg tadalafil product. C centurionlaboratories.com +1 For erectile dysfunction, the usual tadalafil starting dose is 10 mg as needed. It can be increased to 20 mg or reduced to 5 mg depending on effectiveness and sid, and should generally be taken no more than once in 24 hours. D DailyMed So, I would not recommend starting with Vidalista Professional unless a doctor has prescribed that dose for you. If you haven't used tadalafil before, 10 mg is generally the more conservative as-needed starting dose. Do not take tadalafil with nitrate medicines (e.g., nitroglycerin/isosorbide), as this can cause a dangerous drop in blood pressure. D DailyMed If you tell me your age, whether you've used tadalafil before, and whether you take any blood-pressure/heart medicines, I can help you determine what dose is generally appropriate.