The FDA has issued a warning to consumers against using dietary supplements Blue Steel and Hero because they are unapproved and contain an active ingredient that is similar to sildenafil found in Viagra which is regulated by the FDA. The dietary supplements may cause a dangerous increase in blood pressure. Blue Steel is sold in bottles containing 10 blue capsules or blister packs containing two blue capsules. Hero is sold in blister packs containing two blue capsules. Both products distributed by Active Nutraceuticals or the Marion Group, Carrollton, Ga.