Spiders are some of the most feared of all creepy crawly beings, and their venom can be highly toxic. However, some spider venom can actually prove to be very useful in dealing with certain medical conditions. Marta de Nascimento Cordeiro, a researcher at Ezequiel Diaz Foudantion, presented recent findings on the possible use of venom from a spider called the Phoneutria Nigriventer in curing erectile dysfunction. Phoneutria Nigriventer spiders are widely found in South America, including Brazil, Uruguay, Paraguay and Argentina. Other erectile dysfunction treatments such as Viagra are prescribed with caution to patients with heart and blood problems, but ED medicine based on the Phoneutria Nigriventer spider's venom will have no side effects.