KMU Past Paper Practice

Question:

A 35-year-old man develops bronchial smooth-muscle contraction during an inflammatory response. The responsible lipid mediators are formed from arachidonic acid but do not belong to the cyclooxygenase products. Which group most appropriately fits this description?

Correct Answer: Leukotrienes

Explanation: Leukotrienes are arachidonic-acid derivatives produced through the lipoxygenase pathway; cysteinyl leukotrienes can cause bronchial smooth-muscle contraction.

Question:

A febrile patient has increased synthesis of a locally acting lipid mediator within the central nervous system. The same mediator also sensitizes peripheral pain receptors during inflammation. Which eicosanoid is most closely associated with these effects?

Correct Answer: PGE₂

Explanation: PGE₂ contributes to fever through hypothalamic temperature regulation and increases pain sensitivity by sensitizing peripheral nociceptors.

Question:

A 56-year-old man requires long-term anti-inflammatory therapy and has a high risk of NSAID-associated gastric mucosal injury. A synthetic prostaglandin analogue is considered to improve mucosal protection. Which drug is most appropriate?

Correct Answer: Misoprostol

Explanation: Misoprostol is a PGE₁ analogue that enhances gastric mucosal defenses and decreases acid secretion, making it useful for NSAID-related mucosal protection.

Question:

A 48-year-old man with erectile dysfunction is prescribed a drug that directly relaxes cavernosal smooth muscle through prostaglandin-mediated effects. Which agent can be used for this indication?

Correct Answer: Alprostadil

Explanation: Alprostadil is a PGE₁ analogue that promotes smooth-muscle relaxation and increased penile blood flow and can therefore be used in erectile dysfunction.

Question:

A 62-year-old patient with glaucoma is prescribed an ocular prostaglandin analogue. The ophthalmologist explains that the drug belongs to the same therapeutic group as latanoprost and is used to reduce intraocular pressure. Which drug fits this description?

Correct Answer: Travoprost

Explanation: Travoprost is a prostaglandin F receptor agonist used in glaucoma to lower intraocular pressure by enhancing aqueous humor outflow.

Question:

A patient has a mildly exudative dermatitis on the forearm but finds greasy topical preparations cosmetically unacceptable. Which semisolid formulation provides a useful compromise between an ointment and a fluid lotion?

Correct Answer: Cream

Explanation: Creams are semisolid emulsions that are less greasy than ointments and are suitable for many mildly moist or exudative lesions.

Question:

A patient applies an alcohol-containing topical preparation to an excoriated inflammatory lesion and immediately experiences marked stinging. Which formulation is most likely responsible?

Correct Answer: Tincture

Explanation: Tinctures are alcoholic or hydroalcoholic solutions. Their alcohol content can produce significant stinging when applied to inflamed, excoriated or broken skin.

Question:

A patient with widespread scabies has difficulty completing topical treatment correctly because of physical limitations. The clinician considers a systemic antiparasitic drug that is used in selected cases of scabies. Which agent is most appropriate?

Correct Answer: Ivermectin

Explanation: Ivermectin is a systemic antiparasitic treatment that may be used in selected cases of scabies when topical therapy is unsuitable or difficult to apply adequately.

Question:

A man with scabies carefully applies his prescribed topical medication over the recommended body surface. His physician advises another application approximately one week later. What is the main rationale for this instruction?

Correct Answer: To eradicate mites emerging after the first treatment

Explanation: Reapplication helps eliminate mites that emerge after the initial treatment, improving eradication when the first exposure has not eliminated every developing parasite.

Question:

An 18-year-old student has numerous inflammatory papules and pustules over the face and upper back. Topical treatment has been insufficient, and an oral antimicrobial from a commonly used acne drug class is considered. Which agent best represents this approach?

Correct Answer: Doxycycline

Explanation: Tetracycline-group antibiotics such as doxycycline are used for inflammatory acne when systemic antimicrobial treatment is required.

Question:

A 21-year-old man receiving an oral retinoid for severe acne develops cracked lips, dry skin and nasal mucosal dryness despite marked improvement of his acne. Which adverse-effect pattern best explains these findings?

Correct Answer: Retinoid-induced mucocutaneous dryness

Explanation: Isotretinoin commonly produces cheilitis and dryness of the skin and mucous membranes because of its strong effects on sebaceous and epithelial tissues.

Question:

A 34-year-old woman with limited plaque psoriasis is being treated topically. The physician selects an agent related to vitamin D that helps control abnormal epidermal proliferation. Which drug is most appropriate?

Correct Answer: Calcipotriol

Explanation: Calcipotriol is a vitamin D analogue used topically in psoriasis to modify abnormal keratinocyte proliferation and differentiation.

Question:

A patient with extensive psoriasis requires systemic therapy. The dermatologist wants an established systemic immunosuppressive agent rather than a retinoid. Which drug is included among the important treatment options for this condition?

Correct Answer: Cyclosporine

Explanation: Cyclosporine is one of the systemic agents used for more severe psoriasis; the other listed drugs primarily belong to acne or scabies therapy.

Question:

A middle-aged patient takes a concentrated garlic supplement hoping to improve cardiovascular health. Which intended pharmacological benefit has been investigated with garlic preparations?

Correct Answer: Modest improvement in lipid or blood-pressure parameters

Explanation: Garlic has been used for cardiovascular health, and some preparations have shown modest effects on lipid levels or blood pressure, although clinical consistency varies.

Question:

A 64-year-old man taking low-dose aspirin after a cardiovascular event begins using concentrated garlic supplements. Several weeks later, he notices easy bruising. Which pharmacological interaction most likely contributes to this finding?

Correct Answer: Additive impairment of platelet function

Explanation: Garlic can reduce platelet aggregation. Combined with aspirin’s antiplatelet action, this may produce an additive increase in bruising or bleeding tendency.

Question:

A university student begins taking an herbal preparation because it is marketed for reduced fatigue and improved general energy. Which herbal product is most closely associated with this intended use?

Correct Answer: Ginseng

Explanation: Ginseng is commonly taken with the intended purpose of improving energy, reducing fatigue and enhancing general well-being.

Question:

A patient asks why ginseng supplements can produce biological effects rather than acting merely as nutritional fillers. Which class of plant constituents is particularly associated with ginseng?

Correct Answer: Ginsenosides

Explanation: Ginseng contains biologically active constituents called ginsenosides, which contribute to its reported pharmacological effects.

Question:

A patient taking a statin complains of muscle discomfort and asks about a supplement involved in mitochondrial electron transport that has been studied for this type of symptom. Which supplement is being discussed?

Correct Answer: Coenzyme Q10

Explanation: Coenzyme Q10 participates in mitochondrial electron transport and has been studied as a supplement for statin-associated muscle symptoms.

Question:

A patient purchases an unverified herbal preparation online. The physician explains that safety concerns extend beyond differences in active ingredient concentration. Which additional regulatory concern is important with such products?

Correct Answer: Contamination or adulteration

Explanation: Herbal products may have quality-control problems including contamination or adulteration, in addition to variability in their active constituents.

Question:

During medication history, a student records a patient’s vitamin, mineral and non-herbal products taken in addition to the normal diet. Which term most appropriately describes this category?

Correct Answer: Nutritional supplements

Explanation: Nutritional supplements include products such as vitamins and minerals taken to supplement normal dietary intake; botanicals specifically refer to plant-derived products.