Sleep related painful erection: an algorithm for evaluation and management

Sleep related painful erection (SRPE) is a rare parasomnia consisting of nocturnal penile tumescence accompanied by pain that awakens the individual. Normal non-painful erections are experienced when awake. No penile anatomic abnormalities are present. No conclusive randomized clinical trial is present in the literature about the management of this rare condition. The aim of this article is to review the current knowledge about the management of SRPE and to suggest an algorithm to help physicians evaluate and manage SRPE.

A literature review was conducted through PubMed database using the terms: sleep, pain, painful, penile, and erection. The reference lists of the articles were also reviewed. The search returned 23 references that were published between 1987 and 2019. Results were presented in a descriptive manner.

Treatment decision for now is based on reports of the treatment success, the sustainability of remission, the tolerability by the patients and the potential side effects of each medication. From data available in literature, Baclofen is the mostly used medication with a tolerable profile of adverse effects. Phosphodiesterase type 5 inhibitors are considered potential treatments and are already widely used and tolerated for other indications, but so far only 2 successful trials have been reported for SRPE. Cinitapride is very promising, but only one case was studied and no side effects were reported. Clozapine can be very dangerous although highly effective.

Based on the limited number of treatment trials and reported cases, the low level of evidence and the lack of randomized clinical trials, no treatment consensus for SRPE can be reached. We suggested a useful tool for clinicians: an algorithm for the management of SRPE to facilitate their access to the literature without exhaustive return to case reports and series upon each case faced.