Phenomena and Processes

Biological Availability

The extent to which the active ingredient of a drug dosage form becomes available at the site of drug action or in a biological medium believed to reflect accessibility to a site of action.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

The extent to which the active ingredient of a drug dosage form becomes available at the site of drug action or in a biological medium believed to reflect accessibility to a site of action.

MeSH Record

Classification

Broader headings

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MeSH Record

Synonyms

17 entry terms
  • Availability, Biologic
  • Availability, Biological
  • Availability, Physiologic
  • Bioavailability
  • Biologic Availability
  • Physiologic Availability
  • Availabilities, Biologic
  • Availabilities, Biological
  • Availabilities, Physiologic
  • Bioavailabilities
  • Biologic Availabilities
  • Biological Availabilities
  • Physiologic Availabilities
  • Availability Equivalency
  • Availability Equivalencies
  • Equivalencies, Availability
  • Equivalency, Availability

MeSH Record

Indexing Annotation

coordinate NIM with specific drug /pharmacokin

MeSH Record

History Note

79; was BIOLOGIC AVAILABILITY see under BIOPHARMACEUTICS 1970-78; PHYSIOLOGIC AVAILABILITY was see under BIOPHARMACEUTICS 1970-79; AVAILABILITY EQUIVALENCY was see under BIOPHARMACEUTICS 1970-79 and see under BIOLOGICAL AVAILABILITY 1980-86

MeSH Record

Previous Indexing

  • Biopharmaceutics (1966-1974)
  • Drug Compounding (1966-1969)
  • Drugs (1966-1969)
  • Pharmacology (1966-1969)

MeSH Hierarchy

Tree Numbers

AMA Style

References

  1. National Library of Medicine. Biological Availability. Medical Subject Headings (MeSH). 2026. Unique ID D001682. http://id.nlm.nih.gov/mesh/2026/D001682
  2. Biological Availability. In: Wikipedia. https://en.wikipedia.org/wiki/Bioavailability
  3. Biological Availability. In: Wikidata. https://www.wikidata.org/wiki/Q461809