Hypotonia-paralytic dyskinesia: it involves the head, neck and lumbar region, such as the neck is too soft to lift the head, the lumbar region is too soft to straighten and project the abdomen, and the walking is too weak to step and lift the legs and feet to drag the ground. This is a clinical manifestation of late-onset dyskinesia. So how to prevent neck weakness and inability to lift the head? The following is an introduction for everyone. 1, the first thing is to avoid risk factors health search. Clinicians should adhere to the following principles: only patients who really need to apply antipsychotics (such as schizophrenia) should take them, and should never use antipsychotics to treat neurosis or depression, and even more so, antipsychotics should not be used as sleeping pills to treat insomnia. Because the occurrence of delayed movement disorder health search is not related to the size of the drug dose, health search can occur even in small amounts. If the health search is schizophrenia patients with delayed-onset movement disorder occurs, it should be weighed against the importance of the drug and should not be discontinued hastily. 2, soft neck can not lift the head focus on prevention, taking antipsychotic drugs should have clear indications. Gradually discontinue the medication for a few months or 1 to 2 years after the gradual remission of dyskinesia subside. If you need to continue treatment, you can switch to drugs with fewer side effects in the extrapyramidal system, such as clozapine, risperidone, olanzepine, quetiapine, etc. The minimum dose should be given to the old and frail or with organic brain lesions, and anticholinergics should not be used or used sparingly when not necessary.