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The effect of oxytocin in smokers with schizophrenia

The effect of oxytocin on nicotine craving, cognitive disorder, clinical symptoms, and sleep quality in smokers with schizophrenia

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
IRCT
Registry ID
IRCT20250517065767N1
Enrollment
40
Registered
2025-07-19
Start date
2025-08-01
Completion date
Unknown
Last updated
2025-08-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Nicotine dependence (cigarette smoking). Nicotine dependence

Interventions

Intervention 1: Intervention group: Participants in this group receive an intranasal spray containing oxytocin. The spray includes 40 International Units (IU) of oxytocin per daily dose, administered

Sponsors

Kashan University of Medical Sciences
Lead Sponsor

Eligibility

Sex/Gender
Male
Age
18 Years to 60 Years

Inclusion criteria

Inclusion criteria: Willingness and informed consent to participate in the study Diagnosis of schizophrenia Being a current smoker Minimum education level of primary school Having stable schizophrenia symptoms Stable psychiatric medication regimen in terms of type and dose Being male

Exclusion criteria

Exclusion criteria: Current use of substances such as cannabis or opioids Having chronic physical illnesses such as AIDS, hepatitis, liver disease, kidney disease, or heart disease at the time of enrollment

Design outcomes

Primary

MeasureTime frame
Score of nicotine craving using the Nicotine Dependence Syndrome Scale (NDSS) in smokers with schizophrenia; to assess the intensity of craving. Timepoint: Measurement at baseline (prior to intervention with oxytocin or placebo) and at the end of week six (after completing the 6-week nasal spray intervention). Method of measurement: Nicotine Dependence Syndrome Scale questionnaire.;Clinical symptom score using the PANSS (Positive and Negative Syndrome Scale) in smokers with schizophrenia; to evaluate severity of positive, negative, and total symptoms. Timepoint: Measurement at baseline (prior to intervention with oxytocin or placebo) and at the end of week six (after completing the 6-week nasal spray intervention). Method of measurement: Positive and Negative Syndrome Scale questionnaire.;Cognitive performance score using the Montreal Cognitive Assessment (MoCA) in smokers with schizophrenia; to assess cognitive impairments including memory and attention. Timepoint: Measurement at baseline (prior to intervention with oxytocin or placebo) and at the end of week six (after completing the 6-week nasal spray intervention). Method of measurement: Montreal Cognitive Assessment questionnaire.

Secondary

MeasureTime frame
Sleep quality score using the Pittsburgh Sleep Quality Index (PSQI) in smokers with schizophrenia; to assess sleep quality. Timepoint: Measurement at baseline (prior to intervention with oxytocin or placebo) and at the end of week six (after completing the 6-week nasal spray intervention). Method of measurement: Pittsburgh Sleep Quality Index questionnaire.

Countries

Iran (Islamic Republic of)

Contacts

Public Contactfatemeh mehrzad

Kashan University of Medical Sciences

mehrzad.fateme60@gmail.com+98 31 3457 4191

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026