Flex Pharma, Inc. is a biotechnology company that is developing treatments for exercise-associated muscle cramps, nocturnal leg cramps and spasms for neuromuscular conditions. The Company focuses its drug development efforts on developing a product to treat nocturnal leg cramps. The Company's treatment, which forms the basis of both drug product and consumer product development efforts, activates the transient receptor potential (TRP) cation channel receptors in primary sensory neurons in the spinal cord that enhances overall inhibitory tone in motor neurons throughout the body. The Company's pre-clinical drug product candidates are offered for Nocturnal leg cramps, and MS spasticity, cervical dystonia and/or SCI spasticity. The Company's consumer brand and products focuses athletes experiencing exercise-associated muscle cramps, or EAMCs. The Company has commenced formulation and commercialization efforts of its consumer brand.