List of dosage abbreviations

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This is a list of acronyms and abbreviations used to record dosages:

[edit] Frequency

  • PRN -As necessary/needed / Latin- pro re nata
  • Q1H - every hour
  • Q2H - every 2 hours
  • Q3H - every 3 hours
  • Q4H - every 4 hours
  • Q6H - every 6 hours
  • Q8H - every 8 hour


  • SID - 1x/day / veterinary abbreviation
  • QD - 1x/day / Latin- quaque die
  • BID - 2x/day or every 12 hours / Latin- bis in die
  • TID - 3x/day / Latin- ter in die
  • QID - 4x/day / Latin- quater in die



  • 6WK - 6x/week
  • 5WK - 5x/week
  • 4WK - 4x/week
  • 3WK - 3x/week
  • 2WK - 2x/week
  • QWK - 1x/week
  • 2MT- 2x/month
  • QMT- 1x/month

[edit] See also