KMU Past Paper Practice

Question:

A pharmaceutical company develops a medicinal preparation containing an active drug together with lactose, a binder and a coloring agent. The additional substances have no intended therapeutic action but make the tablet suitable for manufacture and administration. Which term best describes these additional substances?

Options:

Correct Answer: Excipients

Explanation: Excipients are pharmacologically inactive formulation components added to provide properties such as bulk, stability, appearance or suitable drug delivery.

Question:

A pharmacist prepares a specially modified formulation for a patient who cannot use the commercially available dosage form. The active drug is incorporated into a preparation suitable for that patient’s requirement. Which professional process is being performed?

Options:

Correct Answer: Compounding

Explanation: Compounding is the preparation or alteration of a medicine to produce a formulation appropriate for an individual patient or specific requirement.

Question:

A pharmacist prepares, labels and supplies a prescribed medicine to a patient and provides instructions regarding its proper use. Which pharmacological term best describes this activity?

Options:

Correct Answer: Dispensing

Explanation: Dispensing includes preparing, labeling and supplying a prescribed medicine together with appropriate instructions for its use.

Question:

During drug development, a compound is described by a lengthy name that precisely specifies its molecular structure. The same compound later receives a simpler non-proprietary name for routine professional use. What type of name was used initially?

Options:

Correct Answer: Chemical name

Explanation: A chemical name describes the molecular structure of a drug, whereas generic, official and trade names serve professional or commercial naming functions.

Question:

A company markets a preparation of paracetamol under its own proprietary product name. Another company sells the same active drug under a different proprietary name. Which category describes these manufacturer-assigned names?

Options:

Correct Answer: Trade names

Explanation: A trade or brand name is a proprietary name assigned by a manufacturer; the generic name identifies the active drug independently of manufacturer.

Question:

A researcher is investigating a medicinal compound isolated from the bark of a plant. The work focuses on the natural source, identification and medicinal properties of the substance rather than its clinical dosing. Which branch of pharmacology is most relevant?

Options:

Correct Answer: Pharmacognosy

Explanation: Pharmacognosy deals with drugs and medicinal substances obtained mainly from natural sources, including their origin and active constituents.

Question:

A drug is being developed for a rare inherited disorder affecting only a small patient population. Commercial development would ordinarily be limited because relatively few patients require the treatment. Which drug category best fits this situation?

Options:

Correct Answer: Orphan drug

Explanation: Orphan drugs are developed for rare disorders affecting small populations where ordinary commercial incentives for development may be limited.

Question:

A health system selects medicines intended to address the priority healthcare needs of its population. Selection emphasizes established effectiveness, safety and public-health relevance. Which concept is being applied?

Options:

Correct Answer: Essential medicines

Explanation: Essential medicines are selected to meet priority population healthcare needs, with emphasis on effectiveness, safety and health-system relevance.

Question:

A biologically active alkaloid is isolated from a crude plant drug. Compared with administration of the unstandardized crude preparation, isolation of this constituent provides which major pharmacological advantage?

Options:

Correct Answer: Improved standardization of drug amount

Explanation: Isolation of the active principle allows the biologically active constituent to be identified, purified and administered in a more accurately standardized amount.

Question:

A therapeutic human protein was previously difficult to obtain in adequate quantities from natural tissue. A human gene is now inserted into suitable host cells, which manufacture the protein for purification and clinical use. Which example is most consistent with this production method?

Options:

Correct Answer: Human growth hormone

Explanation: Recombinant genetic engineering permits host cells to express human therapeutic proteins such as growth hormone after introduction of the corresponding human gene.

Question:

A patient who cannot swallow requires medication. A suppository is selected partly because drug absorbed from some portions of the rectum can enter systemic blood without initially passing entirely through the liver. Which advantage is being utilized?

Options:

Correct Answer: Partial reduction of presystemic loss

Explanation: Rectal venous drainage partly bypasses the portal circulation, so rectal administration may reduce—but does not completely eliminate—first-pass exposure.

Question:

A patient with an airway disorder is prescribed a drug delivered as an aerosol directly into the respiratory tract. The clinician wants a prominent effect in the airways while limiting unnecessary systemic exposure. Which feature makes this route particularly suitable?

Options:

Correct Answer: Direct delivery to respiratory surfaces

Explanation: Inhalational administration can place drug directly at respiratory surfaces, allowing a strong local airway effect with less unnecessary systemic exposure.

Question:

A medication is required to produce a prolonged effect after a single injection. The formulation is designed to remain at the injection site and release drug gradually into the circulation. Which route is particularly suitable for such depot preparations?

Options:

Correct Answer: Intramuscular

Explanation: Intramuscular administration can accommodate depot formulations that remain in muscle and release drug gradually, thereby prolonging drug action.

Question:

A small water-soluble drug molecule crosses a membrane through aqueous pores under the influence of a pressure gradient. No carrier binds the molecule and no metabolic energy is required. Which process best explains its movement?

Options:

Correct Answer: Filtration

Explanation: Filtration is the pressure-driven movement of small molecules through aqueous pores or spaces and does not require a carrier or metabolic energy.

Question:

Two regions of the gastrointestinal tract are exposed to the same concentration of a lipid-soluble drug. One region has a much larger absorptive surface and rich blood flow. Assuming other factors are comparable, what change is expected at this site?

Options:

Correct Answer: Greater rate of drug absorption

Explanation: A large absorptive surface and rich blood supply favor absorption by increasing available membrane area and maintaining the concentration gradient.

Question:

A weak basic drug crosses from one body compartment into another that has a relatively lower pH. In the second compartment, a larger fraction of the drug becomes charged and returns across the membrane less readily. What explains the accumulation?

Options:

Correct Answer: Increased ionization in acidic fluid

Explanation: Weak bases become more ionized in relatively acidic compartments; the charged form crosses lipid membranes poorly and therefore becomes trapped.

Question:

After administration of an oral medicine, serial plasma samples are plotted against time. Preparation X produces a larger area beneath its concentration-time curve than preparation Y after comparable doses. Assuming comparable elimination, what does this most directly indicate?

Options:

Correct Answer: Greater systemic drug exposure

Explanation: The area under the plasma concentration-time curve reflects overall systemic exposure; a larger AUC indicates greater exposure under comparable conditions.

Question:

Two oral products contain the same active drug, dosage form and strength. Their concentration-time curves, however, show clearly different rates and extents of systemic drug availability. Which conclusion is most appropriate?

Options:

Correct Answer: They cannot be considered bioequivalent

Explanation: Bioequivalence requires sufficiently similar rate and extent of systemic availability; pharmaceutical equivalence alone does not establish bioequivalence.

Question:

A drug is well absorbed from the intestine, but only a small fraction of the unchanged dose reaches systemic circulation because much of it is metabolized before leaving the liver. Which change would most directly increase its systemic availability?

Options:

Correct Answer: Using a route that avoids initial portal passage

Explanation: Avoiding initial portal delivery reduces exposure to hepatic first-pass metabolism, allowing a larger fraction of unchanged drug to reach systemic circulation.

Question:

A drug is secreted from the liver into bile and reaches the intestine. Part of the drug is subsequently reabsorbed and returns to the liver through portal blood before re-entering the circulation. Which effect can this recycling have on the drug’s action?

Options:

Correct Answer: Prolong persistence of the drug

Explanation: Enterohepatic circulation recycles drug through biliary excretion and intestinal reabsorption, which can delay final elimination and prolong its presence in the body.