Codeine phosphate compound oral solution commonly known as “cough water”, the product contains codeine (also known as methylmorphine), ephedrine (also known as ephedrine), camphor tincture ingredients are psychotropic drugs (drugs), a large number of doses can stimulate the brain to produce a sense of euphoria, long-term use, can lead to drug dependence, addiction, will cause the drinker psychological behavior It can cause abnormal behavior, personality alienation, and dysfunction of multiple organs and systems in the body. Therefore, patients must be extra careful in the process of using some cough medicines that have addictive effects. The following tests should be done for “cough water” addiction: 1. Brain nerve examination: There are 12 pairs of brain nerves, which are generally named sequentially with Roman numerals. The first and second pairs of brain nerves (olfactory and visual) are the bundles of nerve fibers of the secondary and tertiary neurons in the intracranial part of the brain, and the remaining 10 pairs of brain nerves are connected to the brainstem, which has its nuclei, with the motor nuclei located near the midline and the sensory nuclei on the outside. A portion of the Ⅺ pair of cerebral nerves (paranerves) emanates from the anterior horn of the upper segments of the cervical spinal cord. The cerebral nerves have sensory and motor fibers and mainly innervate the head and face. The I, II, and VIII pairs are sensory nerves, the III, IV, VI, D, and Ⅻ pairs are motor nerves, and the V, VII, IX, and X pairs are mixed nerves. In addition, pairs III, VII, IX, and X contain parasympathetic nerve fibers. All supranuclear innervation of the motor nuclei of the cerebral nerves are doubly innervated, except for two pairs (the lower part of the nuclei of the VII and Ⅻ pairs). Cerebral nerve examination is extremely meaningful for the localization and diagnosis of cranial damage. There are 12 pairs of cerebral nerves, the examination of cerebral nerves should be carried out in sequential order to avoid duplication and omission. 2, cranial MRI examination: cranial MRI examination is an MRI examination of the brain, which is used to observe whether there are lesions in the brain and can clarify whether the patient is caused by structural changes in the brain. Intracranial tumors often cause epilepsy, and MRI has an extremely high diagnostic confirmation rate for low-grade astrocytomas, ganglia, gliomas, arteriovenous malformations and hematomas in the brain.