Related Experiment Videos
Concomitant clozapine reduces smoking in patients treated with risperidone
Ric M Procyshyn1, Gordon Tse, Osric Sin
1Division of Medical Services, Riverview Hospital, Port Coquitlam, BC, Canada. rprocyshyn@bcmhs.bc.ca
Summary
Patients taking clozapine with risperidone smoked less than those on risperidone alone. Clozapine may reduce smoking in patients treated with antipsychotics.
Area of Science:
- Psychiatry
- Pharmacology
- Addiction Medicine
Background:
- Smoking is highly prevalent among patients with schizophrenia spectrum disorders.
- Nicotine dependence may be exacerbated by certain antipsychotic medications.
- Clozapine has a unique pharmacological profile that may influence smoking behavior.
Purpose of the Study:
- To investigate the impact of clozapine, when co-prescribed with risperidone, on smoking behaviors in patients.
- To compare smoking levels between patients receiving risperidone monotherapy versus risperidone/clozapine combination therapy.
Main Methods:
- Utilized expired carbon monoxide (CO) measurements to quantify recent smoking.
- Employed the Fagerstrom Test for Nicotine Dependence (FTND) to assess nicotine dependence severity.
- Conducted semi-structured interviews to gather qualitative data on smoking patterns.
Main Results:
- Patients co-prescribed clozapine with risperidone exhibited significantly lower expired CO levels (19.1±9.3 ppm) compared to those on risperidone alone (37.8±19.1 ppm), P=0.03.
- These findings suggest a marked reduction in smoking behavior with the addition of clozapine.
- The results align with existing literature indicating clozapine's potential to decrease smoking.
Conclusions:
- Clozapine co-administration with risperidone is associated with significantly reduced smoking in patients.
- This study supports the hypothesis that clozapine possesses anti-smoking properties in psychiatric populations.
- Further research is warranted to elucidate the mechanisms underlying clozapine's effect on nicotine dependence.