Sildenafil and its active metabolite have a terminal half-life of approximately 4 hours.Approximately 80% of the dose is excreted in feces, and approximately 13% is excreted in urine.Reduced clearance of sildenafil is seen in people ages 65 years and over, and in those with hepatic impairment or severe renal impairment.Viagra is contraindicated in people with a known allergy to sildenafil, or any of the inactive ingredients in Viagra.Viagra is also contraindicated for use in combination with:© 2004-2020 Healthline Media UK Ltd, Brighton, UK, a Red Ventures Company. But even if your erection goes away after you’ve No, you shouldn’t snort Viagra. Sudden low blood pressure may also be dangerous if you’re taking certain other medications.For example, you shouldn’t take Viagra if you take nitrate medications to treat If you have low blood pressure, taking Viagra could make you feel dizzy or lightheaded, or cause you to faint. The generic is considered to be as safe and effective as the original drug. Nitrates are also found in some recreational drugs such as amyl nitrate or nitrite ("poppers"). If it’s not treated, the condition can damage the tissues in your penis and cause irreversible If you have an erection that lasts longer than 4 hours, go to the nearest emergency room or call 911.Viagra may work faster if you take it on an empty stomach. You should take Viagra according to your doctor’s or healthcare provider’s instructions.For most people, it’s recommended that you take Viagra as needed, about 1 hour before you plan to have sex. In fact, to date, there aren’t any known ways to permanently increase the Viagra helps you get an erection if you’re sexually aroused. For instance, some interactions can interfere with how well a drug works. Viagra may also be used ED can be caused by several different factors.

But if it’s bothersome, you can take a pain reliever containing If you have a severe headache or a headache that won’t go away, call your doctor. So in theory, if a woman takes Viagra, it could increase blood flow to her genitals.But in reality, there’s less PDE5 in a female’s genitals than there is in a male’s penis. Improved erections were reported in:One study only involved men with ED that resulted from a spinal cord injury. So if these side effects are a problem for you, talk with your doctor about taking a lower dosage of Viagra.Don’t forget that some of Viagra’s rare side effects need immediate medical attention. But men taking Cialis were less likely to have flushing compared with men taking Viagra.Viagra and Cialis are both brand-name drugs. Dutasteride is used to relieve symptoms caused due to enlargement of prostate gland (benign prostatic hyperplasia (BPH)) … Tell your doctor about all your current medicines, especially riociguat (Adempas) and nitrates.Do not take Viagra if you are also using a nitrate drug for chest pain or heart problems, including nitroglycerin, isosorbide dinitrate, isosorbide mononitrate, and some recreational drugs such as "poppers". )The study also found that men who took Cialis were more likely to have back or muscle pain than were men taking Viagra. Having a higher level of the drug in your body could increase your risk of side effects.

These lists don’t include all possible side effects.For more information on the possible side effects of Viagra, talk with your doctor or pharmacist. This includes such side effects as headaches, flushing, and dizziness. For example, you should call your doctor right away if you have:The Viagra dosage your doctor prescribes will depend on several factors.

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