Core IM: Mind the Gap on Prescribing Meds Day vs. Night Part 1

May 12, 2019

CORE IM Podcast 2 min read

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For a transcript of the podcast and show notes: https://www.coreimpodcast.com/2019/05/08/medications-daytime-vs-nighttime-part-1/

Time Stamps

  • Why do we dose warfarin at night? (2:45)
  • Back to the basics – what are the pharmacodynamics of warfarin and how does vitamin K intake matter? (4:28)
  • Practical matters – so what should we tell patients (6:14)
  • Dippers and non-dippers – what happens to blood pressure at night? (9:32)
  • The surprising link between dipping and cardiovascular outcomes (11:15)
  • Timing is everything… or is it? The evidence behind taking BP meds at night (11:58)
  • Review of teaching points (15:58)

Thank you to Dr. Matthew Sparks, Nephrologist at Duke and Tania Ahuja, pharmacist at NYU Langone Health for peer-reviewing this episode!

References

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  • https://my.clevelandclinic.org/health/drugs/4713-anticoagulant-medication-warfarin-coumadin
  • Heran BS et al. Effect of medication timing on anticoagulation stability in users of warfarin (the INRange RCT): study protocol for a randomized controlled trial. Trials. 2016 Aug 4;17(1):391.Pushpinderddep K et al. Warfarin dosing and time required to reach therapeutic international normalized ratio in patients with hypercoagulable conditions. Turk J of Hematol. 2016 Dec; 33(4)4:299-303.
  • FDA. Coumadin Tablets Insert. Oct 2011. Accessed at <https://www.accessdata.fda.gov/drugsatfda_docs/label/2011/009218s107lbl.pdf>
  • LR Barker. “Hypertension.” Principles of Ambulatory Medicine 6th Edition Lippincott Williams & Wilkins. 2003 p987
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  • O’Brien E, Sheridan J, O’Malley K. Dippers and non-dippers. The Lancet Aug 13, 1988. Pp 397
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  • Cuspidi C, Facchetti R, Bombelli M, Sala C, Tadic M, Grassi G, Mancia G. Night-time heart rate nondipping: clinical and prognostic significance in the general population. J Hypertens. 2018 Jun;36(6):1311-1317.
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  • ACC cardiotool
  • Laffin LJ, Barkis GL. Has the sun set on nighttime dosing in uncomplicated hypertension? Hypertension. 2018 October; 72(4): 836-838.
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  • Rogers et al. Protocol for assessment of sleep quality and duration in the Treatment In Morning versus Evening (TIME) study: a randomised controlled trial using online patient-reported outcome measures. BMJ Open. 2018 Jun 7;8(6):e021890.