Phenprobamate as a Rare Cause of Hypersomnia: A Case Report

Excessive daytime sleepiness (EDS) is a common complaint encountered in clinical practice. Numerous etiological factors require investigation in patients who present with EDS, including those that can be resolved via simple recommendations. This study reports a case of a 70-year-old man presenting with EDS. The possible etiological causes and diagnostic steps from sleep interrogation to the results with regard to previous literature was discussed. The side effects and mechanisms of drugs should be investigated for direct or indirect central effects in elderly individuals.