Viagra (sildenafil) is a popular prescription medication for erectile dysfunction (ED). Whether or not you have insurance, you can ask your doctor about alternative .This medication is taken with or without food an hour before sex. Generic versions of sildenafil, vardenafil and tadalafil are available. These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects. How and when to take sildenafil It’s important to take sildenafil as advised by a doctor or pharmacist. Talk to your doctor if you take too much sildenafil and you’re worried about any of these side effects: headaches.Refill and transfer prescriptions online or find a CVS Pharmacy near you. Shop online, see ExtraCare deals, find MinuteClinic locations and more. CVS – Online Drugstore, . Available by prescription, these medications — called phosphodiesterase type 5 (PDE5) inhibitors — are designed to help relax smooth muscles and increase blood flow in your . 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.How to take tablets Swallow tablets whole with a drink of water or juice but not grapefruit juice. What side effects can this medication cause? Brand names Why is this medication prescribed? These medicines are called PDE5 inhibitors. If you often forget doses, it may help to set an alarm to remind you.

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