With over 130 clinical trials using 13,000 men the safety of Viagra has never been an issue and the drug has been shown to be safe. Trials show that taking Viagra is about as safe for your heart as taking a sugar pill. The manufacturers of Viagra, tells us that the medication has been used by more than 23 million men worldwide, and over 1 billion doses of Viagra have been prescribed. Viagra has been studied more than any other erectile dysfunction medication mainly due to the fact that it was the first to get public exposure.  As with any drug there may be some side effects but if you are buying Viagra online you should always ensure that you are buying genuine Viagra.

Patients who are useing nitrate drugs, typically used for chest pain, should not take Viagra, but when taking any medication you should talk to your doctor about other drug interactions.

Most side effects associated with Viagra are usually mild and don’t last longer than a few hours however, side effects are more likely with higher doses of the medicine.

Some of the more common side effects noted while taking Viagra are headache, facial flushing, and upset stomach. In some cases Viagra may also briefly cause bluish or blurred vision or sensitivity to light and this effect is not an uncommon side effect with many drugs for erectile dysfunction. It has been found that prolonged erections lasting for more than four hours may occur rarely with all erectile dysfunction treatments in this class of drug. If this happens it is important to seek immediate medical attention. Erections lasting longer than six hours can result in long-term damage to the penis.

Viagra is not approved for anyone other then men and is only for men with erectile dysfunction.  In common with any prescription drug it is unlawful and unsafe to allow anyone else to take your drug. Viagra must be used only when prescribed by a healthcare professional.

You should visit you doctor before taking Viagra and discuss with him all of your pre-existing medical issues. You should ensure to ask your doctor if your heart is healthy enough to engage on normal sexual activity. If you are being prescribed nitrate drugs, like nitroglycerin, you should never take Viagra. The combination of Viagra and nitrates can make your blood pressure suddenly drop to an unsafe level which can result in you becoming dizzy, faint, or even have a heart attack or stroke. Nitrates are common in many prescription medicines that are used to treat angina. The drugs to be concerned about are Nitroglycerin including sprays, ointments, skin patches or pastes, and tablets that are swallowed or dissolved in the mouth, Isosorbide mononitrate and Isosorbide dinitrate. Nitrates are also found in recreational drugs such as amyl nitrate or nitrite known as “poppers". If you are unsure if any of your medicines contain nitrates, or you do not understand what nitrates are, ask your doctor or pharmacist.