People taking nitrates like nitroglycerin Nitrostat or isosorbide mononitrate Imdur should not take PDE5 inhibitors, as doing so could result in a dangerous drop in blood pressure. In the event that an erection persists longer than 4 hours, the patient should seek immediate medical assistance. Vardenafil also does not have an effect on PDE6, which means that it does not have vision adverse effects. A phone or video consultation is sometimes required for legal purposes. Your primary care doctor should always know what medications you’re taking, including ED pills prescribed by another provider. Taking generic ED medications is an effective way to save money without sacrificing quality.Vardenafil HCl is a nearly colorless, solid substance with a molecular weight of g/mol and a solubility of mg/mL in water. LEVITRA is formulated as orange, round, film-coated tablets with “BAYER” cross debossed on one side and “”, “5”, “10”, and “20” on the other side corresponding to mg, 5 mg, 10 mg, and. AdGet a Prescription for ED treatment, discreetly deliverED to your ive Offers · How It Works · Get More Info4/5 ( reviews). a potentially dangerous drop in blood pressure, or hypotension. dizziness. fainting. There is also a risk of stroke and heart attack. A man should not use vardenafil if he is taking nitrate drugs.