AdDon’t go to the pharmacy without checking prices at GoodRx® first. No commitment or fees. Find the lowest price in your neighborhood & use our free coupons to save up to 80%5-Star Reviews · No Credit Card Required · Over 70k Pharmacies””Great price transparency and cost-saving content”” – Investopedia.It can be dangerous to take sildenafil if you also take medicines called nitrates often given for chest pain. Key facts It usually takes 30 to 60 minutes for sildenafil to work for erectile dysfunction. If you experience chest pain, dizziness, or nausea during sexual activity, call your doctor immediately and avoid sexual activity until your doctor tells you otherwise. The following information includes only the average doses of this medicine. It is not known if the medicine is safe for use in these patients. Call your doctor right away if you have blurred vision, confusion, dizziness, faintness, or lightheadedness when getting up from a lying or sitting position suddenly, sweating, or unusual tiredness or weakness.1 day ago · How we vet brands and products. If you’re interested in buying Viagra online, five of the best options available are Hims, Roman, Lemonaid, Optum Store, and REX MD. Read on for full details on. AdDon’t go to the pharmacy without checking prices at GoodRx® first. No commitment or fees. Find the lowest price in your neighborhood & use our free coupons to save up to 80%Service Catalog: Erectile Dysfunction, Levitra, Cialis, Side Effects and more. Erectile dysfunction is when a man has difficulty getting an erection or keeping it long enough for sex. It’s also known as ED or impotence. It happens when not enough blood flows to the penis, preventing an erection. The frequency increases with age, affecting about 50% of men over age 40*; however younger men may also experience ED.This can happen if you are sick with fever, diarrhea, or vomiting; sweat a lot; or do not drink enough liquids. Take sildenafil as needed before sexual activity. Talk to your doctor about eating grapefruit and drinking grapefruit juice while taking this medicine. Do not press on the plunger of the syringe. Please expect up to 4 to 6 weeks for reimbursement. Your doctor may adjust your dose if needed.