Abstract
Reversible cerebral vasoconstriction syndrome (RCVS) is a cerebrovascular disorder highlighted by diffuse and multifocal vasoconstriction of the cerebral circulation. This syndrome has been reported to be associated with provoking vasoactive agents, and the identification of such offenders is quite challenging. In our case, the patient's RCVS was caused by the ingestion of loperamide. Although being reported in the cardiac literature, cerebral vasoconstriction due to loperamide has not been reported yet.