Medication adverse effects and movement disorders
Glasgow Antipsychotic Side-effect Scale (GASS)
Glasgow Antipsychotic Side-effect Scale (GASS) — administration and scoring reference.
Reference information · Official-form reference
- Last content update
- 2026-10-26
- Clinical review
- Not independently reviewed
- Source jurisdiction
- See individual sources
- Coverage
- Official-form reference
| Field | Instrument context |
|---|---|
| Version | GASS; original antipsychotic side-effect self-report |
| Respondent | Self-report |
| Purpose | Glasgow Antipsychotic Side-effect Scale (GASS) — administration and scoring reference. |
Administration
Use the original response periods and item-specific coding. Discuss the adverse effects the person finds distressing.
Scoring method
Item-specific frequency responses summed; distress contextual information separate.
Interpretation & limitations
- Interpret reported frequency and distress alongside examination and medicine-specific monitoring.
- Interpret the findings alongside the clinical interview, functioning, history and relevant physical assessment.
- GASS-C for clozapine is a distinct adaptation. A symptom score does not replace metabolic, cardiovascular or other required clinical monitoring.
- Use the original instrument and manual for item wording, rating anchors, missing-data rules and any normative conversions. This reference does not establish a diagnosis or select treatment.