A case of urinary retention was reported in a 17-year old boy after ecstasy use. He reported experiencing abdominal pain for 12 hours prior to admission and an inability to urinate. He was catheterized and 800 mL of urine was drained. The patient was discharged the next day with no further urinary retention. The authors did not attempt to confirm the presence of MDMA or related drugs in serum or urine, and no information is provided about the number of tablets consumed by the patient prior to urinary retention. This is the second case of urinary retention reported after ecstasy use. Though the authors hypothesize that ecstasy produces urinary retention through norepinephrine release, clearly other factors must be involved, given the relative rarity of this adverse event.