The main role of muscle relaxants is to relieve muscle tension, such drugs are used in clinical practice, mainly for the following purposes: first, to relieve local muscle spasms, if the patient due to cold, excessive fatigue, mental tension and other factors, resulting in local muscle spasms, then you can use such drugs to relieve local muscle spasms, in order to quickly improve the symptoms. Secondly, it can inhibit the excessive hyperactivity of the relevant nerves, such as when the brain or peripheral nerves are overexcited and subsequently cause muscle twitching, the use of such drugs can effectively relieve the muscle spasm caused by the above-mentioned lesions. Therefore, it can be applied to muscle twitching caused by cerebral infarction, cerebral hemorrhage, epilepsy or peripheral neuropathy. Third, it can be applied to the pain caused by muscle spasm left by trauma, such as patients with serious spinal cord injury or serious soft tissue contusion, due to the related inflammation or nerve irritation, resulting in long-term muscle spasm and pain, when such drugs can be used to quickly relieve such symptoms.