G24.09

Clinical Causes: Use of antipsychotic medications (e.g., haloperidol, chlorpromazine) Certain anti-nausea drugs (e.g., metoclopramide, prochlorperazine) Medications affecting dopamine pathways Drug interactions that alter nervous system function High doses or prolonged use of neuroleptic drugs Sensitivity to specific medications affecting muscle control

Key Symptoms: Involuntary muscle contractions leading to twisting or repetitive movements Involuntary eye movements or grimacing Muscle stiffness or rigidity Abnormal postures, such as neck spasms or limb contortions Difficulty speaking or swallowing Pain or discomfort caused by sustained muscle contractions Symptoms often develop within days to weeks of starting medication

Diagnosis Path: Diagnosis of other drug-induced dystonia is primarily clinical, involving a detailed medical history and physical examination. Healthcare providers look for recent medication use, especially neuroleptic drugs, and observe characteristic involuntary movements. Diagnostic tests such as MRI or blood work may be used to rule out other neurological conditions. The temporal relationship between medication initiation and symptom onset is a key diagnostic clue, and improvement upon discontinuation or adjustment of medication supports the diagnosis.

Treatment Protocols: Discontinuing or adjusting the offending medication, under medical supervision Administration of anticholinergic drugs (e.g., benztropine, diphenhydramine) to reduce muscle spasms Use of benzodiazepines for muscle relaxation Supportive care and reassurance for affected individuals In some cases, botulinum toxin injections may be considered for localized muscle dystonia Monitoring for symptom recurrence and medication side effects