ActiPatch is drug free and has no side effects. These devices can be worn by diabetics, arthritics, the elderly and bedridden. The technology has been used for decades in hospitals to help patients recover faster from common pain ailments. Over 1 million products have sold worldwide with no adverse effects. The Radio frequency field strength is too low for any significant heating from implanted metal so it is safe for all metal implants. There is no concern for pacemakers as they have built in RF protection.