Yes and no is the short answer but as with most things life is actually slightly more complicated than this. It can cause a problem when taken in conjunction with other types of therapy for Heart conditions such as Nitrates.
The real problem is the increased availability of Viagra online.
Viagra and nitrates both cause the muscles that control the size of blood vessels to relax. When these muscles relax, the vessels enlarge in diameter and, as a result, blood pressure drops. When Viagra and nitrates are taken together, the effects are greater than when either one is used alone. There may be a marked relaxation of the muscles that control the vessels with a great drop in blood pressure.
Nitrate medications such as nitro-glycerine (yes that of the explosive variety but actually quite safe under these conditions) have been mainstays of preventing and treating angina attacks (chest pain caused by poor blood flow to the heart muscle) for decades. The side effects of either Viagra or nitrate medications alone are mild. They both can cause slight drops in blood pressure, flushing, dizziness or headaches, but when used in combination, these effects are dramatically accentuated and may result in very dangerous and even fatal drops in blood pressure. Anyone taking nitrate medications for any reason must not take Viagra.
