It may only last a few minutes, but it can last as long as a few hours or days. Max dose viagra in 80 year old What is the correct dose for the 2nd, 3rd, 4th & 5th dose for a two year old? To get the best results from Viagra, it’s recommended to:Viagra and generic sildenafil come in several doses, with the total sildenafil content of each pill ranging from 20mg to a maximum dose of 100mg.If you’re using a lower dose of Viagra and find it isn’t fully effective at treating ED (or, it doesn’t seem to provide any improvement at all), consider talking to your doctor about moving up to a higher dose of the medication.It’s quite common for Viagra not to work the first time you take it. How long does it last? Viagra works by blocking cGMP-specific phosphodiesterase type-5 (PDE-5), an enzyme that ends an erection by making blood flow out of the penis. (A full 100mg tablet is pretty hardcore. Taking Viagra relaxes the walls of your blood vessels and lets blood flow more easily into the parts of your penis that cause an erection.Viagra normally starts working 30 to 60 minutes after you take it in oral tablet form. Viagra comes in three different sizes: 25mg, 50mg, or 100mg. Sildenafil, the active ingredient in Viagra, works by blocking the enzyme that regulates blood flow to the penis, helping to increase blood flow for a stronger erection.Most of the time, Viagra works very well for this purpose. It’s one of a class of drugs known as PDE-5 inhibitors. You may get so healthy that you don’t even need erectile dysfunction medication anymore. Health Guide delivered to your inbox Viagra helps to elevate the levels of a substance (cyclic guanosine monophosphate, or cGMP) that causes the tissues to relax, leads to an inflow of blood, and causes an erection with sexual stimulation. However, if your erectile dysfunction is caused by an underlying health condition that affects your blood flow or interest in sex, there’s a chance that Viagra and other ED medications might not be effective.Common physical causes of erectile dysfunction include heart disease, diabetes, nerve damage and high blood pressure.

When a man is aroused, muscles in the penis relax to allow this greater blood flow. The articles on Health Guide are underpinned by peer-reviewed research and information drawn from medical societies and governmental agencies.

Health Guide delivered to your inbox I have experimented with various doses of Viagra up to 200 mg. For most men, the recommended dose is 50 mg. Based on effectiveness and toleration, the dose may be increased to a maximum recommended dose of 100 mg or decreased to 25 mg. Health Guide delivered to your inbox But Viagra itself doesn’t give you an erection. A full stomach can delay your body’s absorption of Viagra, meaning your erection might come later than expected, be less strong than you wanted, and not last as long as you would’ve liked. Instead, you might need to talk to your doctor about treatments such as guided imagery, counseling and sex therapy.Viagra is usually effective at treating erectile dysfunction. The best way to get longer, stronger erections is by improving blood flow, overall cardiovascular health, and hormone levels. However, they are not a substitute for professional medical advice, diagnosis, or treatment.Viagra (sildenafil) is a highly effective oral medication for erectile dysfunction (ED). Viagra does not always work straight away. Viagra probably won’t make you last longer in bed, though. Those include taking the medication at the right time, not taking it on a full stomach, and not taking it with alcohol or illicit drugs.If you have any medical questions or concerns, please talk to your healthcare provider. Their decision often depends on:Regardless of the dosage of Viagra you’re prescribed—and this is important—never take more than one dose per day.If Viagra isn’t working—and you’ve followed all of your doctor’s recommendations —they may prescribe a higher dose or switch you to another medication.More common side effects of Viagra include dizziness, headache, flushing, upset stomach or indigestion, increased sensitivity to light, blurred vision, “blue-tinted” vision, a stuffy or runny nose, insomnia, rash, and muscle pain.Less common side effects of Viagra include priapism (a prolonged erection that won’t go away), heart attack-like symptoms, eye problems such as sudden vision loss, ringing in ears or hearing loss, seizures, or swelling in the extremities.Viagra isn’t right for everyone. It’s important to take a safe dose and work out a clear understanding of how much you should take in a 24-hour period.Some medications for heart conditions, such as nitroglycerin and other nitrates, can interact dangerously with Viagra and cause your blood pressure to drop too low.If Viagra isn’t working or isn’t safe for you, talk to your doctor about other possible treatments for ED, such as:© 2005-2020 Healthline Media a Red Ventures Company. Talk with a healthcare provider about a safe starting dose or before you change your dose.Viagra works best when you’re healthy. You must feel sexually aroused to experience its effects.A real, U.S.-licensed physician will review your information and get back to you within 24 hours.Several factors can influence how quickly and completely Viagra works once you take it.

Those include:If you take Viagra on a full stomach—particularly with a heavy, high-fat meal—the medication may take longer to work.

Healthline Media does not provide medical advice, diagnosis, or treatment. There are numerous erectile dysfunction medications on the market, meaning Viagra isn’t the only option available.If Viagra isn’t effective for you because its doesn’t last long enough, a longer-lasting medication, such as Cialis, could be a better choice.