Drug Absorption · Pharmacology

Which property is most desirable for a drug to be absorbed via passive diffusion across the lipid bilayer of a cell membrane?

  1. High molecular weight
  2. High degree of ionization
  3. High lipid solubility (LogP)
  4. Presence of multiple hydroxyl groups
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Correct answer: High lipid solubility (LogP)

Passive diffusion is the most common mechanism for drug absorption. Lipid-soluble (hydrophobic) drugs dissolve easily in the membrane's lipid bilayer, allowing them to pass through following the concentration gradient.

Difficulty: Medium Question 18 of 20

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