Flupirtine is a non-opioid analgesic and muscle relaxant that was used to treat pain, particularly chronic pain conditions. It was known for its unique mechanism of action, acting as a selective neuronal potassium channel opener. This mechanism was thought to provide pain relief and muscle relaxation by affecting the excitability of nerve cells. Buy high quality Flupirtine from Molsyns Research. Molsyns Research is one of the leading manufacturer and exporter of Flupirtine