Related Experiment Videos
Prolactin levels and erectile function in patients treated with risperidone.
John J Spollen1, Robert G Wooten, Christopher Cargile
1Central Arkansas Veterans Health System, North Little Rock, VA, AR 72114, USA. John.Spollen@med.va.gov
Journal of Clinical Psychopharmacology
|June 23, 2004
Summary
This study found no negative link between prolactin (PRL) elevation from risperidone and erectile dysfunction (ED) in men with schizophrenia. Contrary to expectations, higher PRL levels were linked to better erectile function, suggesting current theories may need revision.
Area of Science:
- Endocrinology
- Psychiatry
- Urology
Background:
- Risperidone treatment is known to increase prolactin (PRL) levels.
- Elevated PRL is often associated with erectile dysfunction (ED).
- The direct impact of risperidone-induced PRL elevation on objective erectile function in schizophrenia patients remains unclear.
Purpose of the Study:
- To investigate the association between risperidone-induced PRL elevations and objective measures of erectile function in male schizophrenia patients.
- To determine if testosterone levels are affected by risperidone treatment.
Main Methods:
- In-patient study over 2 nights with hospitalized male schizophrenia patients.
- Serum PRL, total testosterone, and free/weakly bound testosterone measured multiple times daily.
- Risperidone and metabolite levels assessed on day 1.
- Nocturnal penile tumescence and rigidity measured using RigiScan on both nights.
Main Results:
- High correlation between risperidone levels and PRL elevation (r = 0.92).
- Risperidone did not significantly affect testosterone or free/weakly bound testosterone levels.
- Contrary to hypotheses, higher PRL levels on the second night positively correlated with erectile function (r = 0.68).
Conclusions:
- Objective measures did not confirm a detrimental association between PRL levels and male erectile function in this cohort.
- The findings challenge the presumed negative impact of risperidone-induced hyperprolactinemia on erectile function.
- Further research with larger samples is needed to validate these tentative results.