Volteran is a NSAID drug sold OTC now in a non-prescription strength 1% diclofenac topical gel. It is just like Naprosyn, Alieve, and other OTC non-prescription NSAID drugs. Too much is not a good thing with these drugs. Please be sure to read the lengthy instructions and information pamphlet provided with your medications as it can save your life. Makes no sense to do all these positive things for ourselves only to turn around and cause unintended harm to ourselves instead. As a retired RN I can assure you the information provided by drug makers is important for your well being if you use medications. Don't take it for granted!