vidalista black is a medicine that helps men with erectile dysfunction. It works by relaxing the blood vessels in the penis and increasing blood flow during sexual stimulation. It is a PDE-5 inhibitor and should be taken at least 30 minutes before sex. It should not be taken with nitrates. It is recommended to take the tablet about an hour before sex. It can be taken on an empty stomach or with a meal, but it is best to take it at a fixed time each day. It should be taken only if the doctor prescribes it. It is important to avoid taking the tablet if you have certain health conditions, such as liver and kidney problems. The tablet can stay in the body for more than two days and can cause discomfort for those with liver or kidney problems.