Early onset priapism under chlorpromazine and risperidone therapy

Area of Science:

• Urology
• Psychiatry
• Pharmacology

Background:

• Priapism is a urologic emergency characterized by prolonged, painful erections unrelated to sexual stimulation.
• Psychotropic medications are known potential causes of priapism.
• Concurrent use of chlorpromazine and risperidone has not been previously documented as an etiology for priapism.

Observation:

• A patient undergoing treatment for psychosis developed priapism.
• The patient was concurrently administered chlorpromazine and risperidone.

Findings:

• This case presents the first reported instance of priapism associated with the combined use of chlorpromazine and risperidone.
• The findings suggest a potential drug interaction or additive effect leading to priapism.

Implications:

• Clinicians should be aware of the potential risk of priapism when prescribing chlorpromazine and risperidone concurrently.
• Further investigation into the pharmacodynamics of this drug combination is warranted to understand the mechanism of priapism.
• This case highlights the importance of monitoring for uncommon side effects in patients on multiple psychotropic medications.