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This issue has raised considerable concern. Within the first year of Viagra's release, the FDA documented the deaths of 130 men who were taking the drug. cialis forum Most of these men died of heart disease. Some of them were taking nitrates (nitroglycerin), a type of heart medication that is known to have devastating side effects when combined with Viagra. cialis forum In other men, it is unclear whether Viagra contributed to their death. One theory is that heart problems may be triggered by vigorous sexual activity rather than by Viagra itself. cialis forum cheap 37 5 phentermine Subsequent studies suggest that, in fact, men with stable heart disease may safely use Viagra and related drugs. cialis forum However, PDE5 drugs should never be combined with nitroglycerin or other forms of nitrates (such as isosorbide). cialis forum lowest cost phentermine This can produce a life-threatening drop in blood pressure, even in men without heart problems. cialis forum diet