More serious side effects may include a drop in blood pressure or an erection that lasts longer than four hours. Levitra vardenafil : This medication is taken one hour before sex and can last up to 24 hours. It might work longer if you have mild to moderate erectile dysfunction. Please expect up to 4 to 6 weeks for reimbursement. People with heart conditions should never take ED medications without consulting a doctor. This information is reviewed by a licensed practitioner who will assess your eligibility for the medication. Shake the liquid well for 10 seconds before each use to mix the medication evenly.According to price-comparison site test1.ru, generic Revatio will cost you as little as $ per pill, depending on where you fill your prescription. That’s compared with more than $50 per. Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Sildenafil (Liqrev, Revatio) is used to improve the ability to exercise in adults (Liqrev, Revatio) and children 1 year of age and older (Revatio) with pulmonary arterial hypertension (PAH; high blood pressure in the vessels carrying blood to the . Brand Names: Revatio Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). Learn more about Viagra oral. 1 This is a generic drug. .