PT  - JOURNAL ARTICLE
AU  - Andrea H.S. Loewen
AU  - Mark E. Hudon
AU  - Michael D. Hill
TI  - Thunderclap headache and reversible segmental cerebral vasoconstriction associated with use of oxymetazoline nasal spray
AID  - 10.1503/cmaj.1040631
DP  - 2004 Sep 14
TA  - Canadian Medical Association Journal
PG  - 593--594
VI  - 171
IP  - 6
4099  - http://www.cmaj.ca/content/171/6/593.short
4100  - http://www.cmaj.ca/content/171/6/593.full
SO  - CMAJ2004 Sep 14; 171
AB  - OXYMETAZOLINE IS A SYMPATHOMIMETIC amine found in over-the-counter nasal decongestants. We report a case of chronic use of nasal oxymetazoline associated with thunderclap headache due to reversible segmental intracranial vasoconstriction.