Vidalista Black 80 mg product for erectile dysfunction, but 80 mg is far above the usual maximum recommended as-needed dose of 20 mg for erectile dysfunction. Tadalafil increases blood flow to the penis during sexual stimulation. A higher dose does not guarantee a stronger erection, but it can significantly increase the risk of dangerous side effects. Who should NOT use Vidalista Black 80 mg? People taking nitrate medicines for chest pain, such as nitroglycerin or isosorbide, or using recreational nitrites (“poppers”). The combination can cause a dangerous drop in blood pressure. People taking riociguat, a medicine used for certain types of pulmonary hypertension. People advised to avoid sexual activity because of serious heart disease or Vidalista Black 80 mg  problems. People with severe low blood pressure, uncontrolled high blood pressure, or certain serious heart or liver conditions without medical clearance. People who have previously had sudden vision loss due to non-arteritic anterior ischemic optic neuropathy (NAION), or who have certain serious eye conditions. People who have had serious allergic reactions to tadalafil. Who should be especially cautious? Talk to a doctor before using tadalafil if you have: Kidney or liver disease. A history of stroke or heart attack. Diabetes or high blood pressure. A blood disorder such as sickle-cell disease. A curved penis or a history of prolonged erections. Medicines for prostate symptoms or blood pressure, which may interact with tadalafil. NHS +1 Important: Vidalista Black 80 mg is not a standard recommended dose for erectile dysfunction. The usual maximum as-needed dose is 20 mg. Do not combine it with Vidalista 20, Vidalista 60, Cenforce, Viagra, or other erection medicines. If you've already taken 80 mg, don't take more. Seek urgent medical help if you experience chest pain, fainting, sudden vision or hearing loss, or an erection lasting more than four hours.