No serious sequelae have been seen with Priapus Toxin. But, since Priapus Toxin uses Botox, and since Botox for ED works by the same mechanism as does Viagra (relaxing the smooth muscle of the arteries in the penis), in theory, any side effect seen with either Botox or with Viagra could happen with the Priapus Toxin procedure. For that reason, the consent form includes the same warnings included with consent for those two drugs. The amount of Botox used. however, when doing Priapus Toxin is less than what is used for the treatment of migraines, and less than 1% of the LD50 (the toxic dose) for a 130 pound man. Since Botox can be mixed and injected in ways that are less safe and less effective than our Priapus Toxin procedure method, we highly recommend you find a provider that is a member of the Cellular Medicine Association.