Viagra: Uses, Dosage, Side Effects, Warnings – Drugs.com

Viagra is usually taken only when needed, 30 minutes to 1 hour before sexual activity. You may take it up to 4 hours before sexual activity. Do not take Viagra more than once per day. Shake the oral suspension (liquid) before you measure a dose. Use the dosing syringe provided, or use a medicine dose-measuring device (not a kitchen spoon). Erectile dysfunction meds, like Viagra and Cialis, can help maintain an erection. However, the side effects, dosage schedule, and other factors are different for each. TABLETS (Viagra) Initial dose: 50 mg orally once a day, as needed, about 1 hour prior to sexual activity Maintenance dose: May increase to 100 mg or decrease to 25 mg once a day, based on efficacy and tolerability. Maximum dose: 100 mg orally once a day Comments: This drug may be taken anywhere from 30 minutes to 4 hours before sexual activity. viagra mexico Sildenafil (Viagra). This medicine works best when you take it on an empty stomach an hour before sex. The body takes longer to absorb it after a high-fat meal or alcohol. Its effects often last for 4 to 5 hours. It might work longer if you have mild to moderate erectile dysfunction. Vardenafil. Sildenafil, sold under the brand name Viagra, among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. It is also sometimes used off-label for the treatment of certain symptoms in secondary Raynaud’s phenomenon.

Generic Viagra, known as sildenafil, is an alternative to the branded drug Viagra that can be used to treat erectile dysfunction (ED) and is available online at a fraction of the price. 4.1 Nitrates. Consistent with its known effects on the nitric oxide/cGMP pathway [see Clinical Pharmacology (12.1, 12.2)], VIAGRA was shown to potentiate the hypotensive effects of nitrates, and its administration to patients who are using nitric oxide donors such as organic nitrates or organic nitrites in any form either regularly and/or intermittently is therefore contraindicated.

Check with your doctor immediately if any of the following side effects occur: Less common. Bladder pain. burning feeling in the chest or stomach. burning, crawling, itching, numbness, prickling, pins and needles, or tingling feelings. cloudy or bloody urine. dizziness. A headache, stomach upsets, and flushing are the main side effects, and it should not be taken within 24 hours of a nitrate. 5. Tips. If you are taking sildenafil Viagra is a drug that helps treat erectile dysfunction. It improves blood flow to the penis, and its effects can last for up to 4 hours, although the effect will likely be stronger after 2 hours. viagra side effects stomach Most online services for Viagra offer doses from 20 to 100 mg. Taking higher doses of Viagra won t always mean that it works better, and taking too high a dose can cause unwanted side effects. Taking too much sildenafil can cause unpleasant side effects. Talk to your doctor if you take too much sildenafil and you’re worried about any of these side effects: headaches; dizziness; indigestion; blocked nose; changes to your vision While you may not be able to avoid some of the more common side effects of sildenafil, there are some other Viagra warnings to take note of. Specifically, you should be aware of sildenafil drug interactions with some medications, such as those used to treat high blood pressure, heart disease and other cardiovascular health issues.

Very few men report any side effects, such as flushing, stuffy or runny nose, headache, changes in vision, and dizziness, from taking Viagra. You should, however, seek medical attention if you experience any loss in vision or hearing or if you experience an erection that does not go away on its own (after more than four hours).