KAPS – Knowledge Assessment of Pharmaceutical Sciences — Questions and Answers

Question 1: Which pharmacokinetic parameter is MOST useful for comparing total drug exposure between different dosing regimens or formulations?

Time to peak concentration (Tmax)
Elimination half-life
Peak concentration (Cmax)
Area under the plasma concentration-time curve (AUC) (Correct answer)

Correct answer: Area under the plasma concentration-time curve (AUC)

The AUC represents total drug exposure over time and is the standard parameter used to compare bioavailability between different formulations or routes of administration.

Question 2: Which of the following is the correct procedure for reconstituting a lyophilized powder for injection?

Direct the diluent stream against the vial wall (Correct answer)
Shake vigorously immediately after adding diluent
Add diluent rapidly to maximize dissolution
Direct the diluent stream onto the powder cake

Correct answer: Direct the diluent stream against the vial wall

Directing diluent against the vial wall prevents foaming and protein denaturation, ensuring proper reconstitution.

Question 3: A liposomal drug formulation is used primarily to achieve which therapeutic objective?

Increase the drug's aqueous solubility by ionic interaction
Enable passive targeting to tumor tissue via the EPR effect (Correct answer)
Mask the bitter taste for oral administration
Improve chemical stability of the drug in the GI tract

Correct answer: Enable passive targeting to tumor tissue via the EPR effect

Liposomes accumulate in tumor tissue through the Enhanced Permeability and Retention (EPR) effect due to leaky tumor vasculature and poor lymphatic drainage.

Question 4: Which reaction mechanism involves simultaneous bond breaking and bond formation in a single concerted step, commonly seen in SN2 reactions?

Backside attack with inversion of configuration (Correct answer)
Electrophilic addition
Nucleophilic substitution via carbocation intermediate
Radical chain mechanism

Correct answer: Backside attack with inversion of configuration

SN2 reactions proceed via backside nucleophilic attack with simultaneous leaving group departure, resulting in Walden inversion.

Question 5: When preparing a sterile IV admixture in a horizontal laminar airflow workbench (LAFW), the pharmacist should work at least how far inside the hood?

6 inches (Correct answer)
12 inches
9 inches
3 inches

Correct answer: 6 inches

USP <797> requires that all critical manipulations be performed at least 6 inches inside the LAFW to ensure sterile airflow protection.

Question 6: Which formulation strategy would MOST effectively increase the oral bioavailability of a poorly water-soluble drug (BCS Class II)?

Micronization to reduce particle size (Correct answer)
Adding an enteric coating
Increasing filler excipient concentration
Increasing tablet hardness

Correct answer: Micronization to reduce particle size

Micronization increases the surface area of drug particles, which enhances dissolution rate and thereby improves oral bioavailability for poorly soluble drugs.

Question 7: Volume of distribution (Vd) is BEST described as:

A hypothetical volume relating total drug in the body to plasma concentration (Correct answer)
The actual plasma volume in the body (approximately 3 L)
The total body water volume (approximately 42 L)
The volume of urine produced per day

Correct answer: A hypothetical volume relating total drug in the body to plasma concentration

Volume of distribution is a hypothetical (not anatomical) volume representing the ratio of the total amount of drug in the body to its plasma concentration.

Question 8: Why is the protein binding of a drug clinically significant?

Protein-bound drug has a smaller volume of distribution
Protein binding enhances drug metabolism in the liver
Only the free (unbound) drug fraction is pharmacologically active and available for distribution (Correct answer)
Protein-bound drug is excreted more rapidly by the kidneys

Correct answer: Only the free (unbound) drug fraction is pharmacologically active and available for distribution

Only free (unbound) drug can cross membranes, interact with receptors, be metabolized, and be excreted; protein-bound drug acts as an inactive reservoir.

Question 9: Which excipient class is primarily used to prevent crystal growth in amorphous solid dispersions?

Disintegrants like croscarmellose sodium
Polymeric stabilizers like HPMC or PVP (Correct answer)
Surfactants like sodium lauryl sulfate
Lubricants like magnesium stearate

Correct answer: Polymeric stabilizers like HPMC or PVP

Polymeric stabilizers such as HPMC and PVP inhibit recrystallization of amorphous drug by increasing viscosity and forming intermolecular interactions.

Question 10: Enterohepatic recirculation refers to:

Drug cycling between the intestine and liver via biliary excretion followed by intestinal reabsorption (Correct answer)
Drug movement from plasma into intestinal mucosal cells
Active secretion of drugs from bloodstream into the intestinal lumen
First-pass metabolism of drugs in the intestinal wall (gut wall metabolism)

Correct answer: Drug cycling between the intestine and liver via biliary excretion followed by intestinal reabsorption

Enterohepatic recirculation occurs when drug or its metabolites excreted into bile are reabsorbed from the intestine, prolonging the drug's half-life and duration of action.

Question 11: A patient states they stopped taking their antihypertensive because it 'made them feel worse than before.' The pharmacist should FIRST:

Recommend switching to a herbal supplement for blood pressure
Ask the patient to describe what side effects they experienced before addressing management options (Correct answer)
Inform the prescriber without discussing further with the patient
Tell the patient to resume the medication immediately

Correct answer: Ask the patient to describe what side effects they experienced before addressing management options

Eliciting a specific description of the adverse effects guides the pharmacist in determining whether symptoms are manageable, require dose adjustment, or warrant prescriber contact.

Question 12: What does the term 'pharmacovigilance' refer to?

Monitoring drug stability
Enhancing production efficiency
Assessing adverse drug effects (Correct answer)
Improving drug solubility

Correct answer: Assessing adverse drug effects

Pharmacovigilance is the science and activities relating to the detection, assessment, understanding, and prevention of adverse effects or any other drug-related problems. Its primary goal is to continuously monitor the safety of medicines once they are on the market, identifying new or changing risks to ensure patient safety. This ongoing surveillance helps to optimize drug use and protect public health.

Question 13: Which metabolic reaction is considered a Phase I biotransformation reaction?

Sulfation
Oxidation via CYP450 (Correct answer)
Acetylation
Glucuronidation

Correct answer: Oxidation via CYP450

CYP450-mediated oxidation is a Phase I reaction that introduces or unmasks a functional group on the drug molecule.

Question 14: Which of the following changes to an approved NDA requires a Prior Approval Supplement (PAS) before implementation?

A change in the expiration dating period supported by new stability data
A change in batch size within approved validated ranges
A minor label change to correct a typographical error
Addition of a new indication not included in the original approval (Correct answer)

Correct answer: Addition of a new indication not included in the original approval

Adding a new indication is a major change requiring FDA approval via a PAS before the change can be implemented.

Question 15: A patient says, 'I read online that my antibiotic can cause tendon rupture. Should I be worried?' The pharmacist's BEST response is to:

Validate the concern, confirm it is an FDA black box warning for fluoroquinolones, and counsel on warning signs (Correct answer)
Dismiss the concern as internet misinformation
Contact the prescriber to have the medication changed before counseling the patient
Reassure the patient that online information is always exaggerated

Correct answer: Validate the concern, confirm it is an FDA black box warning for fluoroquinolones, and counsel on warning signs

Fluoroquinolone-associated tendinopathy and rupture carry an FDA black box warning; confirming the risk and educating on early symptoms (pain, swelling) is appropriate and legally required counseling.

Question 16: Which parameter in chromatography is defined as the ratio of the time a solute spends in the stationary phase to the time it spends in the mobile phase?

Selectivity factor (α)
Retention factor (k) (Correct answer)
Plate number (N)
Asymmetry factor

Correct answer: Retention factor (k)

The retention factor k = (tR - tM) / tM, representing the ratio of time spent in stationary versus mobile phase.

Question 17: A pharmacist is auditing compounding records and finds that temperature logs for the cleanroom were not recorded for three days. This constitutes:

A violation only if the preparations were already dispensed to patients
A critical documentation deviation requiring investigation and corrective action (Correct answer)
A minor finding that can be corrected by retroactively filling in estimated temperatures
An acceptable gap if no preparations were compounded on those days

Correct answer: A critical documentation deviation requiring investigation and corrective action

Missing environmental monitoring records are a critical deviation because they undermine the ability to verify that preparations were compounded under acceptable conditions.

Question 18: A stability study conducted at 40°C/75% RH for 6 months is classified as which type of stability testing per ICH Q1A?

Stress testing
Accelerated stability testing (Correct answer)
Long-term stability testing
Intermediate stability testing

Correct answer: Accelerated stability testing

ICH Q1A defines 40°C ± 2°C / 75% RH ± 5% RH as the accelerated storage condition for products intended for storage below 25°C.

Question 19: Which document is essential for submitting a new drug application (NDA)?

Patent certificate
Environmental impact assessment
Clinical trial data (Correct answer)
Stability report

Correct answer: Clinical trial data

Clinical trial data is absolutely essential for submitting a New Drug Application (NDA) to regulatory bodies like the FDA. This data, gathered from human studies, provides comprehensive evidence of the drug's safety and efficacy, demonstrating that its benefits outweigh its risks for the intended use. Without robust clinical trial data, an NDA cannot be approved, as it forms the basis for regulatory decision-making.

Question 20: Which equation correctly describes the relationship between elimination half-life (t½), volume of distribution (Vd), and clearance (Cl)?

t½ = Vd × Cl / 0.693
t½ = Cl / (0.693 × Vd)
t½ = 0.693 × Vd / Cl (Correct answer)
t½ = 0.693 × Cl × Vd

Correct answer: t½ = 0.693 × Vd / Cl

The equation t½ = 0.693 × Vd / Cl shows that half-life increases as the volume of distribution increases and decreases as clearance increases.

Question 21: A medication error resulting in patient harm that requires intervention to sustain life is classified under the NCC MERP index as:

Category F
Category E
Category H (Correct answer)
Category G

Correct answer: Category H

NCC MERP Category H is defined as an error that required intervention necessary to sustain the patient's life.

Question 22: Under 21 CFR Part 314, what is the standard review period for a standard NDA after it is accepted for filing?

18 months
6 months
12 months
10 months (Correct answer)

Correct answer: 10 months

The standard FDA review goal for an NDA under PDUFA is 10 months from the date of filing.

Question 23: According to OSHA standards, employers must maintain records of employee occupational exposure incidents for:

10 years
Duration of employment plus 30 years (Correct answer)
5 years
Duration of employment only

Correct answer: Duration of employment plus 30 years

OSHA's Bloodborne Pathogens Standard (29 CFR 1910.1030) requires medical and exposure records to be maintained for the duration of employment plus 30 years.

Question 24: A 70 kg patient with a creatinine clearance of 15 mL/min requires gentamicin. Which dosing strategy is most appropriate?

Reduced dose at extended interval (Correct answer)
Standard dose at standard interval
Standard dose at extended interval
Reduced dose at standard interval

Correct answer: Reduced dose at extended interval

Severe renal impairment requires both dose reduction and interval extension for aminoglycosides to prevent accumulation and nephrotoxicity.

Question 25: Which of the following best defines 'apparent volume of distribution' (Vd)?

The volume of tissue where the drug binds to receptors
The actual physical volume of plasma in the body
A hypothetical volume in which a drug would need to be uniformly distributed to account for its plasma concentration (Correct answer)
The volume of urine excreted per unit time

Correct answer: A hypothetical volume in which a drug would need to be uniformly distributed to account for its plasma concentration

Vd is a theoretical volume that relates the total amount of drug in the body to the drug concentration measured in plasma.

Question 26: Which technique measures the molecular weight and size distribution of polymers used in controlled-release formulations, such as PLGA microspheres?

X-ray powder diffraction (XRPD)
Zeta potential measurement
Karl Fischer titration
Gel permeation chromatography (GPC) (Correct answer)

Correct answer: Gel permeation chromatography (GPC)

GPC (also called size exclusion chromatography) separates polymers by hydrodynamic volume to determine molecular weight distribution, which directly affects PLGA degradation rate and drug release.

Question 27: A pharmacist uses the Cockcroft-Gault equation to estimate creatinine clearance. Which patient characteristic most significantly affects this calculation?

Height and blood pressure
Body surface area and hemoglobin
Age, sex, weight, and serum creatinine (Correct answer)
Urine output and serum albumin

Correct answer: Age, sex, weight, and serum creatinine

The Cockcroft-Gault equation uses age, sex, weight, and serum creatinine to estimate creatinine clearance for drug dosing.

Question 28: Steady-state plasma concentration is typically achieved after approximately how many half-lives of continuous dosing?

2–3 half-lives
8–10 half-lives
1–2 half-lives
4–5 half-lives (Correct answer)

Correct answer: 4–5 half-lives

Steady-state is reached after approximately 4–5 half-lives (~97% of true steady-state), at which point the rate of drug input equals the rate of elimination.

Question 29: Which mechanism best explains the hepatotoxicity seen with acetaminophen overdose?

Direct inhibition of mitochondrial cytochrome c oxidase
Immune-mediated hepatitis triggered by acetaminophen metabolites
Accumulation of NAPQI depleting glutathione and binding hepatic proteins (Correct answer)
Competitive inhibition of hepatic bile acid transporters

Correct answer: Accumulation of NAPQI depleting glutathione and binding hepatic proteins

CYP2E1 converts excess acetaminophen to the reactive metabolite NAPQI; when glutathione stores are depleted, NAPQI covalently binds hepatic macromolecules, causing necrosis.

Question 30: Which type of isomerism occurs when two compounds have the same molecular formula but differ in the connectivity of atoms?

Stereoisomerism
Enantiomerism
Conformational isomerism
Constitutional isomerism (Correct answer)

Correct answer: Constitutional isomerism

Constitutional (structural) isomers share the same molecular formula but have different atom connectivity.

KAPS – Knowledge Assessment of Pharmaceutical Sciences

The KAPS exam is a two-paper multiple-choice assessment administered by the Australian Pharmacy Council (APC) that evaluates internationally qualified pharmacists' knowledge of pharmaceutical sciences required for registration in Australia. Paper 1 covers pharmaceutical chemistry, pharmacology, and physiology; Paper 2 covers pharmaceutics and therapeutics.

Questions

35 min

Time Limit

50%

To Pass

Checking for saved progress...

Exam Rules

You can skip questions and return to them later
Flag questions for review before submitting
No feedback shown until you submit the entire exam
Unanswered questions count as wrong — answer everything
10 pretest questions are mixed in and don't affect your score
Timer auto-submits when time runs out
Your progress is auto-saved every 30 seconds