Cramp 911, developed by a pharmacist, is the innovator in cramp and muscle spasm treatment technology for muscle cramps and back and neck spasms. Cramp 911 muscle relaxing lotion is the product of over 10 years of work with patients, athletes, and trainers. It has been reported to relieve a muscle cramp within 30 to 60 seconds after application. Cramp 911 has been reported to relieve leg cramps, back and neck spasms, hand, foot and toe cramps. It has also been reported useful for muscle cramps caused by medications. Other uses have been for muscle soreness and muscle injury. Cramp 911 should be applied directly to the muscle cramp or spasm zone and spread out over the entire muscle. Only a small amount is necessary for results (2 swipes over the affected area and you will immediately start to feel your pain subside). Cramp 911 can be applied during a muscle cramp for relief and can also be applied to prevent a muscle cramp. Convenient Roll on Applicator.