Vidalista Black 80 mg you mean the tadalafil product marketed at that strength, its popularity is largely because it's advertised as a very high-strength, long-lasting ED medication. However, there is an important safety distinction: Tadalafil can last up to about 36 hours at standard ED doses, which is one reason it is popular. 80 mg is far above the usual maximum recommended as-needed ED dose of 20 mg. Taking more tadalafil doesn't reliably make the effect better or proportionally longer. Higher doses increase the likelihood of headache, flushing, dizziness, indigestion, back pain, rapid heartbeat, and low blood pressure. If you're seeing Vidalista Black 80 mg sold online, the quality and authenticity can also be uncertain depending on the seller. So its popularity shouldn't be taken as evidence that 80 mg is a better or safer dose. For most men, a clinician would consider 10–20 mg for as-needed tadalafil rather than 80 mg. If you've already taken Vidalista Black 80 mg, tell me when you took it and whether you're having any symptoms, and I can tell you what to watch for.