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MCQ Practice

Pharmaceutics MCQs with Answers and Explanations

Pharmaceutics MCQs connect formulation choices to patient outcomes — solubility to bioavailability, excipient function to stability.

Read the explanations for the mechanism; examiners often reword the same concept.

10 free questions shown · 100 in the full test

Topics covered

  • Dosage form design
  • Excipient functionality
  • Biopharmaceutics and BCS
  • Pharmacokinetic basics
  • Unit operations

10 Pharmaceutics MCQs with answers

  1. Q1

    Bioavailability is defined as:

    • AFraction of administered dose reaching systemic circulation unchanged
    • BTotal drug excreted
    • CDrug bound to plasma proteins
    • DDrug metabolized in liver

    Explanation: Bioavailability (F) = fraction of unchanged drug reaching the systemic circulation.

  2. Q2

    Suspensions are:

    • ASolid in liquid coarse dispersion
    • BLiquid in liquid
    • CGas in liquid
    • DSolid in gas

    Explanation: Suspensions are coarse dispersions of insoluble solids in a liquid vehicle.

  3. Q3

    Emulsion is:

    • ALiquid-in-liquid dispersion
    • BSolid-in-liquid
    • CGas-in-solid
    • DSolid-in-solid

    Explanation: Emulsions disperse one immiscible liquid in another using emulsifiers.

  4. Q4

    Sustained release dosage forms aim to:

    • AMaintain drug levels over extended time
    • BRelease immediately
    • CAvoid GI absorption
    • DIncrease first-pass effect

    Explanation: SR formulations prolong drug release to maintain therapeutic plasma levels.

  5. Q5

    Enteric coating is designed to dissolve in:

    • AStomach (acidic pH)
    • BSmall intestine (higher pH)
    • CMouth
    • DColon only

    Explanation: Enteric polymers (e.g., HPMCP) dissolve at higher intestinal pH, protecting the drug from gastric acid.

  6. Q6

    Half-life (t½) of a first-order drug:

    • ADepends on dose
    • BIs constant
    • CDoubles every dose
    • DEquals Cmax

    Explanation: For first-order kinetics, t½ is independent of dose.

  7. Q7

    Volume of distribution (Vd) is:

    • AApparent volume relating drug amount to plasma concentration
    • BActual body water
    • CLung volume
    • DCardiac output

    Explanation: Vd = Amount in body / Plasma concentration — an apparent volume.

  8. Q8

    First-pass metabolism occurs primarily in:

    • ALungs
    • BLiver
    • CKidneys
    • DSkin

    Explanation: First-pass metabolism mainly happens in the liver (and gut wall).

  9. Q9

    Lyophilization is:

    • AFreeze drying
    • BSpray drying
    • CTray drying
    • DVacuum distillation

    Explanation: Lyophilization removes water from frozen product via sublimation.

  10. Q10

    Isotonic saline concentration is:

    • A0.9% w/v NaCl
    • B5% NaCl
    • C10% NaCl
    • D0.45% NaCl

    Explanation: Normal saline = 0.9% NaCl, isotonic with blood plasma.

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