viagra and nitrates

A. CHOUDHRY, MD, of Mississauga, ON, would like to know: "Is there any way to use nitrates in an emergency situation if the patient has had Viagra. Viagra and nitrates should not be taken together as there can be a marked drop in blood pressure. However, caution should be used in prescribing Viagra. A good history and physical examination is prudent -- and remember, no Viagra and nitrates. . A partial list of drugs which should not be taken in conjunction with Sildenafil. Don't take VIAGRA if you take nitrates, often prescribed for chest pain, as this may cause a sudden, unsafe drop in blood pressure.. When mixed with nitrates, Viagra can lower the blood pressure, making the patient dizzy, lightheaded or faint. In some cases, Viagra taken with nitrates has.