I would suggest you start by looking up the psychiatric side effects/harms of any medications your husband may be taking.
There are also previous relevant posts on the forum:
- athena experiencing obsessive jealousy with dopamine agonist ropinirole,
- a post by Tot who did a search and found Othello Syndrome - a delusional jealousy,
- and a post where the moderator provides a link to a Parkinson’s uk information sheet explicitly stating : hallucinations or delusions… usually happen as a side effect of your Parkinson’s medication.
Further information:
https://www.drugs.com/pro/sinemet.html
Sinemet Generic name: carbidopa and levodopa. Medically reviewed by Drugs.com. Last updated on Jun 29, 2022.
Adverse Reactions/Side Effects [include]: Nervous System/Psychiatric
Psychotic episodes including delusions, hallucinations, and paranoid ideation, bradykinetic episodes (“on-off” phenomenon), confusion, agitation, dizziness, somnolence, dream abnormalities including nightmares, insomnia, paresthesia, headache, depression with or without development of suicidal tendencies, dementia, pathological gambling, increased libido including hypersexuality, impulse control symptoms… memory impairment
Repinex XL [ropinirole] Last updated on emc: 12 Jul 2023 This information for use by healthcare professionals
4.8 Undesirable effects [include]: Psychiatric disorders - Psychotic reactions (other than hallucinations) including delirium, delusion, paranoia.
Problems in Parkinson’s Disease C.D.Marsden & Stanley Fahn (in Movement Disorders: Neurology edited by C. David Marsden, Stanley Fahn Butterworth Scientific 1982)
p.4 Psychiatric disturbances: Another common problem for the patient on long-term levodopa therapy is the emergence of a range of mental side effects. These include a typical toxic confusional state, isolated hallucinosis, delusions, obsessional behaviour, global dementia, and psychotic disorders including severe depression and a schizophreniform syndrome.
Although many of these conditions can occur in the untreated patient, the first possibility to consider is that these are a side-effect of drug therapy .
Any of the anti-parkinsonian drugs may cause a toxic confusional state or hallucinosis. If mild, the first step might be to withdraw amantadine and/or anticholinergics. Recovery may be delayed for days or even weeks. If the disturbance is severe, disrupting family life, or threatening work, it may be necessary to admit the patient to hospital in order to withdraw all drugs, including levodopa, temporarily…
A common situation is a patient who is immobile, but rational, or who is mobile, but mad.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8263449/pdf/10072_2021_Article_5249.pdf
Othello syndrome in Parkinson’s disease: a systematic review and report of a case series G.De Micheli & G.R.Palmieri & C.Pane & C.D.P.D.Iacovo & S.Perillo & F.Saccà & G.De Michele & A.De Rosa Neurological Sciences (2021) 42:2721–2729