DON'T use this if you are taking nitrates (heart medications) or use "poppers." Please. The drug interactions can cause a drop in blood pressure that may be fatal. Yes, there have been deaths recorded.
Learn about other potential side effects.
This page lists side effects and has a lot of information. The most frequent side effects are headache and facial flushing. Side effects are dosage related. People with certain medical conditions should steer clear. Learn about these before you use these meds.