A 28-year-old man with a recent diagnosis of schizophrenia is started on a high-potency first-generation antipsychotic. He is monitored closely for adverse effects. Arrange the following antipsychotic-induced movement disorders in expected chronological order based on their typical timeline of onset, from earliest to latest.
- 1Acute dystonia (e.g., sudden sustained contraction of neck muscles or torticollis)
- 2Akathisia (e.g., subjective inner restlessness and continuous pacing)
- 3Drug-induced parkinsonism (e.g., resting tremor, cogwheel rigidity, masked facies)
- 4Tardive dyskinesia (e.g., involuntary choreoathetoid movements of the face, lips, and tongue)
Answer
The expected chronological sequence of antipsychotic-induced movement disorders is: acute dystonia, followed by akathisia, then drug-induced parkinsonism, and finally tardive dyskinesia.
The temporal progression of movement disorders following antipsychotic administration follows a predictable chronological pattern, often taught using the 'Rule of 4s' mnemonic: acute dystonia (4 hours to days), akathisia (4 days to weeks), drug-induced parkinsonism (4 weeks to months), and tardive dyskinesia (4 months to years). Acute dystonia presents as sudden, sustained muscle contractions. Akathisia presents as a subjective feeling of severe restlessness. Parkinsonism features a resting tremor, bradykinesia, and rigidity. Tardive dyskinesia involves involuntary choreoathetoid movements, characteristically appearing after chronic therapy.
Step-by-Step Solution
Key Concept
Timeline of onset for antipsychotic-induced extrapyramidal symptoms and tardive dyskinesia.
Alternative Method
Use the 'Rule of 4s' mnemonic for typical maximum onset times: 4 hours for acute dystonia, 4 days for akathisia, 4 weeks for parkinsonism, and 4 months for tardive dyskinesia.
Estimated Time:1m 0s