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Angina, treated with nitroglycerin is being prohibitive to this treatmentWhat is sildenafil ?The medication sildenafil, which is sold under the brand names Viagra and other names, is used to treat both erectile dysfunction and pulmonary arterial hypertension. If it can assist ladies with sexual dysfunction is unclear. It can be given intravenously or taken orally.The duration of sildenafil's effects varies from person to person and is dependent on factors like weight, age, and other health issues. Typically, sildenafil wears off after 4-6 hours. An erection shouldn't endure longer than four hours, as you should be aware of. If so, seek medical attention.Learn more about Sildenafil here:https://brainly.com/question/11185154#SPJ4