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Related Experiment Videos

[Drug administration through the rectum: reliability, tolerance].

G Cheymol1

  • 1Service de pharmacologie, CHU St-Antoine, Paris, France.

Annales De Gastroenterologie Et D'Hepatologie
|June 1, 1987
PubMed
Summary
This summary is machine-generated.

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Rectal drug administration via suppositories offers higher bioavailability than oral routes for some medications, avoiding first-pass metabolism. While generally safe, local side effects like ano-rectitis can occur with certain vehicles.

Area of Science:

  • Pharmacokinetics and Drug Delivery
  • Gastroenterology and Rectal Therapeutics

Context:

  • Suppositories are the primary method for rectal drug administration.
  • Drug release and absorption depend on vehicle properties, drug liposolubility, ionization, and venous drainage bypassing hepatic circulation.

Purpose:

  • To evaluate the pharmacokinetic advantages of rectal drug administration.
  • To compare rectal versus oral bioavailability for drugs undergoing significant first-pass metabolism.
  • To assess the safety and side effect profile of rectal drug delivery systems.

Summary:

  • Rectal administration, particularly with suppositories, can achieve higher bioavailability than oral routes for drugs like lidocaine and propranolol due to avoidance of hepatic first-pass metabolism.
  • Experimental rectal osmotic pumps offer stable plasma concentrations.

Related Experiment Videos

  • Adverse effects are typically local, with vehicles potentially causing ano-rectitis; severe cases like ulcerations are linked to specific suppository ingredients.

    • Impact:

    • Highlights the potential of the rectal route to improve therapeutic outcomes for specific medications.
    • Informs the development of safer and more effective rectal drug delivery systems.
    • Provides insights into managing and preventing local adverse events associated with rectal drug administration.