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It is therefore recommended not to exceed a maximum single dose of 25 mg of VIAGRA in a 48 hour period [see DOSAGE AND ADMINISTRATION, WARNINGS AND PRECAUTIONS, CLINICAL PHARMACOLOGY]. But they may not work well — or even be safe to take — if you’re taking nitrates for chest pain or medications for high blood pressure. Viagra and other FDA-approved ED pills are considered safe to take.
Do not take VIAGRA if you take medicines called guanylate cyclase stimulators which include:
You may experience an increase in side effects and their severity. If VIAGRA does not help you to get an erection, or if your erection does not last long enough for you to complete sexual intercourse you should tell your doctor. If you feel that the effect of VIAGRA is too strong or too weak, talk to your doctor or pharmacist. You should be aware of how you react to VIAGRA before you drive or use machinery. ("poppers"), as the combination may also lead to a dangerous fall in your blood pressure. You can find out about the side effects of recreational drugs on the Frank website.
have low blood pressure, or high blood pressure that is not controlled
VIAGRA does not protect against sexually transmitted diseases, including HIV. Although your doctor is the best source for answering your specific questions about erectile dysfunction (ED) and treatment with VIAGRA, you can find answers to common questions here. Treat erectile dysfunction with an affordable FDA-approved medication that has the same active ingredient as "name brand" Viagra, but costs significantly less. Keep a written list of all of the prescription and nonprescription (over-the-counter) medicines, vitamins, minerals, and dietary supplements you are taking.
Taking Viagra to Improve Sexual Function
Maximum observed plasma concentrations are reached within 30 to 120 minutes (median 60 minutes) of oral dosing in the fasted state. When VIAGRA is taken with a high fat meal, the rate of absorption is reduced, with a mean delay in T of 60 minutes and a mean reduction in Cmax of 29%. The mean steady state volume of distribution (Vss) for sildenafil is 105 L, indicating distribution into the tissues. Sildenafil and its major circulating N-desmethyl metabolite are both approximately 96% bound to plasma proteins. VIAGRA is contraindicated in patients with a known hypersensitivity to sildenafil, as contained in VIAGRA and REVATIO, or any component of the tablet. Hypersensitivity reactions have been reported, including rash and urticaria [see ADVERSE REACTIONS].
Sildenafil is a PDE-5 inhibitor (phosphodiesterase type 5 inhibitor), which means it blocks the effects of the PDE enzyme, relaxing the blood vessels in the penis and helping to increase blood flow. This can help men to achieve and maintain an erection hard enough for sex. Sildenafil tablets are effective in around 60-70% of men when taken as prescribed. Sildenafil is generally safe as long as you take the recommended dose and follow the instructions of your prescribing healthcare provider. Taking more than the recommended dose of sildenafil puts you at risk for serious side effects, such as heart problems, vision problems, or permanent damage to the penis. Some patients who take alpha-blocker therapy for the treatment of high blood pressure or prostate enlargement may experience dizziness or light-headedness, which may be caused by low blood pressure upon sitting or standing up quickly.
When filling your prescription, be sure to call ahead to make sure your pharmacy carries it. Examples of drugs that can cause interactions with sildenafil are listed below. Productive talks with your doctor can help you find your best treatment options. GoodRx is not available outside of the United States and therefore, access to the site is blocked. If you are trying to access this site from the United States, please try heading to our homepage or our drug directory.
In erectile dysfunction, however, blood flow to the penis can be too low and disrupt the ability to get or maintain an erection. Drugs such as Viagra relax smooth muscles and increase blood flow to the penis, making it easier to get or BUY XANAX WITHOUT PRESCRITION keep an erection. People with erectile dysfunction find it difficult reach or maintain an erection, even during sexual arousal. The condition can have a variety of causes, but it usually relates to poor blood flow to the penis. This type of Viagra can be purchased over the counter and online.