You are encouraged to report adverse events related to Viatris products by calling U. Liquid sildenafil will usually be made up for you by your pharmacist. The combination can cause a dangerous fall in your blood pressure. The following nonprescription or herbal products may interact with sildenafil: cimetidine Tagamet HB , St. Hims offers access to safe, effective care that is more convenient than visiting a doctor in-person for ED medication. Serious adverse events such as hearing or vision loss have also been reported in patients taking ED pills, although it is not clear if these adverse events were caused by the ED medication.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 . Sildenafil tablets for erectile dysfunction come in different strengths ranging from 25mg to mg. The usual dose is 50mg, when you need it. Do not take it more than once a day. The dose can be increased to mg or decreased to 25mg depending on its effect. Take sildenafil up to 4 hours before you want to have sex. 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.