title: Intracerebral hemorrhage following possible interaction between celecoxib and clopidogrel.
abstract: OBJECTIVE
  To report a case of intracerebral hemorrhage following short-term, concomitant use of celecoxib and clopidogrel.
  
  
  METHODS
  An 86-year-old white woman with a medical history of paroxysmal atrial fibrillation, heart failure, osteoarthritis, peptic ulcer disease, chronic airway limitation, and surgery for carcinoma of the bowel and breast began clopidogrel therapy following a syncopal episode. She also began taking celecoxib for osteoarthritis at the same time. Three weeks later, she presented with headaches and left hemiparesis. Computed tomography scan revealed intracerebral hemorrhage that had not been previously detected. Celecoxib and clopidogrel were discontinued, and she recovered fully.
  
  
  CONCLUSIONS
  This is the first case describing a possible interaction between celecoxib and clopidogrel. A pharmacokinetic interaction mediated by CYP2C9 is possible. However, the hemorrhage may have been secondary to the effects of either drug alone or concomitant disease.
  
  
  CONCLUSIONS
  Celecoxib and clopidogrel have favorable risk profiles and, therefore, are prescribed widely among older people. However, clinicians should recognize that there may be an interaction between celecoxib and clopidogrel that increases the risk of hemorrhage in older people.
authors.affiliation: Canberra Hospital, Garran ACT, Australia.
authors.forename: A A
authors.initials: AA
authors.lastname: Fisher
authors.forename: D G
authors.initials: DG
authors.lastname: Le Couteur
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000068579:Celecoxib; D002543:Cerebral Hemorrhage / Q000139:chemically induced*; D000077144:Clopidogrel; D016861:Cyclooxygenase Inhibitors / Q000009:adverse effects*; D004347:Drug Interactions; D005260:Female; D006801:Humans; D010975:Platelet Aggregation Inhibitors / Q000009:adverse effects*; D011720:Pyrazoles; D013449:Sulfonamides / Q000009:adverse effects*; D013988:Ticlopidine / Q000009:adverse effects* / Q000031:analogs & derivatives; D014057:Tomography, X-Ray Computed
chemical_list: D016861:Cyclooxygenase Inhibitors; D010975:Platelet Aggregation Inhibitors; D011720:Pyrazoles; D013449:Sulfonamides; D000077144:Clopidogrel; D000068579:Celecoxib; D013988:Ticlopidine