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Related Experiment Videos

Sumatriptan (Imitrex) transport by the human placenta

S Schenker1, Y Yang, A Perez

  • 1Department of Medicine, University of Texas Health Science Center at San Antonio 78284-7878, USA.

Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.)
|December 1, 1995
PubMed
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Sumatriptan (Imitrex) has minimal transfer across the human placenta. Only small amounts of the parent drug cross from mother to fetus, indicating limited fetal exposure during migraine treatment.

Area of Science:

  • Pharmacology
  • Obstetrics
  • Drug Metabolism

Background:

  • Sumatriptan is a selective 5-hydroxytryptamine receptor agonist used for acute migraine management.
  • Limited data exists regarding the transfer of sumatriptan across the human placenta.

Purpose of the Study:

  • To assess the transport of sumatriptan across the normal term human placenta.
  • To determine the extent and mechanism of sumatriptan transfer from mother to fetus.

Main Methods:

  • Utilized the isolated perfused human placental cotyledon technique.
  • Measured sumatriptan transfer over a 4-hour period in a maternal-to-fetal direction.

Main Results:

  • Approximately 15% of the maternal dose transferred to the fetal compartment over 4 hours.

Related Experiment Videos

  • Transfer occurred via passive diffusion, with equal rates in both directions.
  • Only the parent sumatriptan molecule crossed; placental metabolism was observed but not characterized.

    • Conclusions:

    • Sumatriptan exhibits limited transfer across the human placenta, primarily as the parent drug.
    • Passive diffusion is the main transport mechanism, suggesting minimal fetal exposure after single maternal doses.
    • Further investigation is needed to identify placental metabolites of sumatriptan.