title: A pilot study of paternal drug exposure: the Motherisk experience.
abstract: BACKGROUND
  There is a dearth of information on paternal drug exposure at the time of conception. The Motherisk Program, established in 1985, is a teratology information and clinical consultation service on drug safety during pregnancy and lactation, as well as paternal exposure (PEx). Here, we reviewed for the first time our experience with PEx.
  
  
  METHODS
  This was an observational retrospective cohort study using a prospectively collected database. Telephone counselling records from January 2002 to December 2007, inclusive, were screened to identify cases concerning PEx.
  
  
  RESULTS
  Of a total of 188,188 counselling requests over these 6 years, 301 (0.16%) pertained to PEx. Counselling was most frequently sought on methotrexate, finasteride, prednisone and azathioprine. For many drugs, limited or no information was available on PEx.
  
  
  CONCLUSIONS
  Paternal exposure represents a small fraction of counselling requests to Motherisk. Our findings suggest that there is an ongoing need for information on paternal drug exposure.
authors.affiliation: Division of Clinical Pharmacology and Toxicology, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada.
authors.forename: Candace Y W
authors.initials: CY
authors.lastname: Lee
authors.forename: Cheng
authors.initials: C
authors.lastname: Jin
authors.forename: Andrea M
authors.initials: AM
authors.lastname: Mata
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Tanaka
authors.forename: Adrienne
authors.initials: A
authors.lastname: Einarson
authors.forename: Gideon
authors.initials: G
authors.lastname: Koren
mesh_terms: D001379:Azathioprine / Q000627:therapeutic use; D001942:Breast Feeding / Q000706:statistics & numerical data; D015331:Cohort Studies; D003376:Counseling / Q000706:statistics & numerical data; D016208:Databases, Factual; D064420:Drug-Related Side Effects and Adverse Reactions; D005260:Female; D006801:Humans; D007774:Lactation / Q000187:drug effects; D008297:Male; D008727:Methotrexate / Q000627:therapeutic use; D018812:Paternal Exposure / Q000009:adverse effects*; D004364:Pharmaceutical Preparations / Q000145:classification; D010865:Pilot Projects; D011247:Pregnancy; D012189:Retrospective Studies; D013689:Telephone; D018600:Teratology / Q000706:statistics & numerical data*
chemical_list: D004364:Pharmaceutical Preparations; D001379:Azathioprine; D008727:Methotrexate