Narcotic analgesia is usually morphine as well as pethidine. 1. Morphine: Morphine belongs to the narcotic fungus, which is one of the more common ones and can eliminate tension and anxiety. Morphine is usually used for post-surgical analgesic treatment, but morphine has certain side effects, such as nausea, vomiting, respiratory depression, and itching of the skin, and is not suitable for people with traumatic brain injury. 2. Pethidine: with analgesic and sleeping effects, usually used for various pain, such as traumatic pain, post-surgical pain, and local anesthesia or static-absorption compound anesthesia for auxiliary drugs. However, this drug has certain side effects, may appear peripheral vasodilatation and blood pressure drop and so on. It is not suitable for patients with liver function impairment and thyroid insufficiency. Narcotic analgesics, when there is no clear diagnosis of pain. As far as possible, do not use such drugs to avoid masking the condition and delaying diagnosis and treatment, and need to be applied under the guidance of a doctor.