Psychotropics, sedation and driving (MEQ)

(i) Crash-risk profile. Age 68 with chronic long-half-life BZD (diazepam), regular zopiclone, new SSRI, near-misses and alcohol use is a high-risk stack. Thomas: BZD use roughly doubles MVC risk in case-control synthesis; older drivers are vulnerable.[2] Hemmelgarn: long-half-life BZDs elevate elderly crash risk.[3] Barbone and broader medicinal-drug reviews support population-level BZD–accident association; Gustavsen links zopiclone (and other hypnotics) prescriptions to traffic accident risk — zopiclone is not “safe because not a BZD.”[5][8][10] Dassanayake meta-analysis consolidates BZD (and related) impairment evidence.[7]

(ii) Residual impairment and SDLP. Verster: benzodiazepine hypnotics and zopiclone impair on-road driving the morning after bedtime dosing; magnitude depends on dose, half-life and hours since dose. SDLP (standard deviation of lateral position) is the experimental gold-standard weaving metric used to quantify residual impairment relative to alcohol-calibrated effects.[1][4] Early commute at 06:30 after night zopiclone is precisely the residual window.

(iii) Immediate advice and medication review. Explicit temporary no-drive (or tightly restricted driving) until sedative load reduced and near-misses cease; no alcohol with sedatives; arrange safe transport for work; start planned BZD taper (not abrupt stop without plan); stop or minimise zopiclone with non-drug insomnia care; continue sertraline with monitoring but do not blame the SSRI alone for the entire risk stack; early review for sedation, anxiety rebound and sleep.[1][4][7][9]

(iv) Concurrent BZD + antidepressant. Fournier: concurrent benzodiazepines and antidepressants increase MVA risk in older drivers, particularly with long-acting BZDs — his new sertraline on a diazepam background is exactly this phenotype for shared decision and deprescribing urgency.[6]

(v) Documentation. Record: licence class (private light vehicle vs any commercial duties), current mental state and near-miss history, full sedative/alcohol reconciliation, specific advice given (temporary restriction, no alcohol, residual zopiclone warning), patient understanding, medication change plan, review date, and reference to local fitness-to-drive standards (e.g. Austroads principles) without inventing statute numbers; note higher bar if occupational driving emerges.[1][9]