Be wary of any product that claims to be a natural form of Viagra. Herbal supplements aren't held to the same standards as prescription and over-the-counter medications — so it can be difficult to know which ones are safe or effective. Prescription medications used to treat erectile dysfunction — sildenafil (Viagra), tadalafil (Cialis), vardenafil (Levitra), and others — work by increasing blood flow to the penis when you become sexually aroused. Some "herbal viagra" supplements are advertised as a cheaper alternative, available without a prescription. Some of these products do contain substances that improve blood flow by relaxing the walls of blood vessels. However, none of them focuses specifically on blood vessels in the penis, as do Viagra and similar prescription drugs. As a result, these "herbal viagra" supplements can cause dangerously low blood pressure in some men — particularly men who take nitrate medications for heart problems. Links to other sites are provided as a convenience to the viewer. Pfizer accepts no responsibility for the content of linked sites. This website is neither owned nor controlled by Pfizer. Pfizer does not endorse and is not responsible for the content or services of this site. Continue You are now leaving to enter a website neither owned nor operated by Pfizer. Links to all outside sites are provided as a resource to our visitors and do not imply an endorsement or recommendation of a particular physician by Pfizer, nor an endorsement of any Pfizer product by a telehealth provider or any physician. Pfizer accepts no responsibility or liability for the content or services of other websites. Buy viagra online Buy viagra online.ie Clonidine hot flushes Where to buy generic propecia uk Sildenafil, sold as the brand name Viagra among others, is a medication used to treat erectile dysfunction and pulmonary arterial hypertension. Viagra is a safe and effective erectile dysfunction treatment for many men. Sildenafil Price includes your prescription, your medicine and 24hr delivery. Because sildenafil citrate is a treatment, not a cure, for erectile dysfunction ED, many men may choose to use it for an extended period. Men with ED who had previously completed 1 of 4 double-blind trials with short-term open-label extension combined duration, 0.9–1.2 years were eligible for. If these effects are mild, they may go away within a few days or a couple of weeks. If they’re more severe or don’t go away, talk to your doctor or pharmacist. Call your doctor right away if you have serious side effects. Call 911 if your symptoms feel life-threatening or if you think you’re having a medical emergency. Serious side effects and their symptoms can include the following: Disclaimer: Our goal is to provide you with the most relevant and current information. However, because drugs affect each person differently, we cannot guarantee that this information includes all possible side effects. This information is not a substitute for medical advice. Sildenafil is used to treat male sexual function problems (impotence or erectile dysfunction-ED). In combination with sexual stimulation, sildenafil works by increasing blood flow to the penis to help a man get and keep an erection. This drug does not protect against sexually transmitted diseases (such as HIV, hepatitis B, gonorrhea, syphilis). Consult your doctor or pharmacist for more details. Read the Patient Information Leaflet provided by your pharmacist before you start taking sildenafil and each time you get a refill. If you have any questions, ask your doctor or pharmacist. To treat erectile dysfunction-ED, take this drug by mouth as directed by your doctor, usually as needed. Take sildenafil at least 30 minutes, but no more than 4 hours, before sexual activity (1 hour before is the most effective). A high-fat meal may delay how quickly the drug begins to work. Is sildenafil safe Common Side Effects of Viagra Sildenafil Citrate Drug Center - RxList, When is it Not Recommended to Take Viagra? What Can Affect its. Propecia clinical trialsMetformin constipationDoxycycline 75 mgAzithromycin coverage VIAGRA contains sildenafil, which is the same medicine found in another drug called REVATIO. REVATIO is used to treat a rare disease called pulmonary arterial hypertension PAH. VIAGRA should not be used with REVATIO or with other PAH treatments containing sildenafil or any other PDE5 inhibitors such as Adcirca tadalafil Frequently Asked Questions VIAGRA® sildenafil citrate.. Long-term safety and effectiveness of sildenafil citrate in.. Herbal viagra' Is it safe? - Mayo Clinic. See risks and benefits. VIAGRA® sildenafil citrate can help men with erectile dysfunction. Click to learn more on how VIAGRA® works. While most men can safely take Viagra sildenafil, this oral erectile dysfunction ED treatment is not recommended for men who have certain health conditions or are taking certain medications. Viagra Warnings. Some medicines are not safe to take with Viagra. Specifically, Viagra shouldn’t be used in combination with a nitrate drug for treating chest pain or heart problems. This.