Vidalista 20 It is used to treat erectile dysfunction (ED) and pulmonary arterial hypertension. If you have ED, you should take one tablet at least 30 minutes before you go to the bathroom. Because the affects could last up to 36 hours, you shouldn't take more than one tablet a day. It's important to carefully follow the dose instructions and only take this medicine as your doctor or pharmacist tells you to. The normal dose to treat pulmonary arterial hypertension is 40 mg, which is equal to two 20 mg tablets, taken once a day at the same time every day. If you are taking Vidalista 20, it is very important to do exactly what your doctor tells you or what the label says. Don't take more of it, use it more often, or keep taking it longer than your doctor told you to. The dose depends on your health, how well you respond to treatment, and any other drugs you may be taking. Also, keep Vidalista 20 out of the reach of children and pets and in a cool, dry place that is out of direct sunlight, away from wetness, and away from heat.