Sildenafil (Viagra citrate) is a prescribed drug meant for the treatment of erectile dysfunction - a problem when the person can not have sex because of not enough erection. Taking St. John's wort in addition to Sildenafil has actually been reported to create innovation bleeding, so ensure you let your wellness care carrier understand about taking this supplement. Nitrates can be discovered in entertainment drugs (poppers) and a variety of various other medicines you may be considering upper body discomfort. When your heart will not be getting sufficient oxygen, they can never be integrated or taken soon after Sildenafil as this could result in a risky drop in blood tension. Make sure you discuss to your health treatment company the truth of taking nitrates and do not take Sildenafil up until a minimum of 2 weeks after the last dosage of nitrates pass.