Nicotine, varenicline, and dual diagnosis smoking — MEQ

(i) Dependence and ward irritability. Thirty cigarettes/day with time to first cigarette ≤5 minutes indicates high nicotine dependence on FTND logic. Abrupt forced abstinence on a smoke-free ward without adequate NRT commonly produces withdrawal (irritability, craving, poor concentration) that can be misread as personality or early relapse — treat nicotine withdrawal actively while monitoring psychosis.[2][4]

(ii) Pharmacotherapy and behavioural plan. Same-day combination NRT: high-dose patch (commonly 21 mg/24 h if appropriate) plus short-acting gum 4 mg or lozenge/spray for breakthrough craving, with behavioural support and quit-date planning if he elects a full quit during admission. Alternatively or sequentially, varenicline titration 0.5 mg daily ×3 days → 0.5 mg BD ×4 days → 1 mg BD, typically start before quit date when ambulatory, course often 12 weeks, with nausea/sleep counselling.[3][6] Clozapine pearl: smoking cessation reduces polycyclic aromatic hydrocarbon induction of CYP1A2 and can raise clozapine levels — monitor levels/side-effects and adjust dose with the treating psychiatrist; NRT does not replace smoke induction the same way. Avoid bupropion if seizure risk is a concern on clozapine (individualise). Offer structured counselling/quitline linkage.[4]

(iii) EAGLES counselling. Explain that EAGLES found no significant increase in the primary composite neuropsychiatric adverse event endpoint for varenicline versus nicotine patch or placebo in smokers with and without psychiatric disorders, while confirming efficacy benefits — so diagnosis of schizophrenia alone is not a reason to withhold. Still monitor mood, psychosis, and suicidality as standard care during any quit attempt.[1]

(iv) Gambling priorities. Take a full gambling history (forms, losses, chasing, concealment, illegal acts), corroborate debt with consent, reassess suicide risk carefully (denial on brief screen is not enough when partner reports catastrophic debt), implement financial safeguards (self-exclusion, third-party money control), offer CBT/MI referral, mutual help, and only consider naltrexone adjunct later under specialist review — not as day-1 sole treatment.[5]

(v) Disposition. Discharge with ongoing NRT or varenicline supply plan, early community follow-up, clozapine monitoring plan if smoking status changes, gambling service referral, partner-inclusive safety plan, crisis contacts, and harm-reduction interim goals if full abstinence not yet secured.[1][4][5]