Welcome to your 💊 Eicosanoids, Dermatologic & Herbal Pharmacology Arena
1.
A patient says that a herbal product must be safe because it is natural. Which statement best reflects an important pharmacological concern regarding such products?
2.
A 31-year-old man with scabies is unable to use first-line topical therapy because of intolerance. An alternative topical agent is chosen that has both scabicidal and antipruritic properties but is less reliably effective than permethrin. Which drug fits this description?
3.
A 22-year-old man with severe acne improves markedly after an oral drug that reduces sebaceous gland size and sebum production. During follow-up, laboratory monitoring shows an abnormality commonly associated with this treatment. Which finding is most likely?
4.
A patient taking antipsychotic medication starts using ginseng for fatigue. Soon afterward, new central nervous system symptoms appear. Which principle best explains the concern with this combination?
5.
A patient taking an NSAID develops gastric discomfort after prolonged therapy. The protective action normally provided by endogenous gastric prostaglandins is reduced. Which effect best explains this loss of protection?
6.
A locally produced mediator causes vasodilation and inhibits platelet aggregation. Which mediator best explains these effects?
7.
A patient with extensive psoriasis is prescribed a systemic drug that binds nuclear retinoid receptors and alters keratinocyte growth and differentiation. Which drug acts by this mechanism?
8.
Most prostaglandins produce their pharmacological effects by binding to which type of receptor?
9.
A 29-year-old woman develops postpartum uterine atony with persistent bleeding despite initial measures. A prostaglandin analogue is considered because of its strong stimulatory effect on uterine smooth muscle. Which drug is most appropriate?
10.
A newborn has a congenital cardiac lesion in which temporary maintenance of ductus arteriosus patency is required. Which drug is most appropriate?
11.
A woman receiving treatment for severe nodulocystic acne is advised to use strict pregnancy-prevention measures. Which drug is responsible for this concern?
12.
A woman with acne has evidence that androgenic stimulation contributes to increased sebaceous gland activity. Which drug may be used for its antiandrogen effect?
13.
A woman with inflammatory acne has recurrent flares related to androgenic stimulation. The clinician chooses a pharmacological approach that reduces sebaceous gland stimulation without using an oral retinoid. Which treatment strategy best fits this mechanism?
14.
A topical preparation is prescribed to form a relatively thick protective layer over a localized irritated skin area while limiting spread to surrounding skin. Which formulation best provides this property?
15.
A patient presents with an acutely inflamed, weeping skin lesion with considerable exudate. Which preparation is most suitable initially?
16.
A patient purchases two brands of the same herbal preparation and assumes they will contain identical amounts of active compounds. Which feature of herbal products makes this assumption unreliable?
17.
A patient applies a topical scabicide to excoriated skin and develops marked burning and irritation. The preparation is an older agent that must be kept away from the eyes and mucous membranes. Which drug was most likely used?
18.
Which drug is commonly considered a preferred topical treatment for uncomplicated scabies?
19.
A patient taking warfarin regularly begins using concentrated garlic supplements. Which clinical consequence is of greatest concern?
20.
A patient receiving warfarin asks about starting Coenzyme Q10. Which interaction is most important to recognize?
21.
A patient has an inflamed dermatosis extending over a large area of the trunk. The clinician wants a preparation that can be spread easily over a broad surface without marked greasiness. Which vehicle is most appropriate?
22.
A 19-year-old student starts topical tretinoin for comedonal acne. One week later, she reports erythema, peeling and burning over treated areas. Which interpretation is most appropriate?
23.
A patient is prescribed permethrin for scabies. Which instruction is most appropriate?
24.
A teenager with inflammatory acne is treated with topical clindamycin. The physician adds another topical drug mainly to reduce bacterial resistance while also providing bactericidal activity against Cutibacterium acnes. Which agent is most appropriate?
25.
A patient has a chronic dry, thick and scaly skin lesion. Which topical formulation is most suitable for improving hydration and drug penetration?
26.
A pregnant woman requires pharmacological cervical ripening before induction of labor. The selected agent acts as a prostaglandin E₂ preparation and promotes cervical softening with uterine contraction. Which drug is most appropriate?
27.
A 24-year-old man has an inflammatory eruption involving the scalp and other densely hair-bearing areas. A topical drug is required, but greasy preparations interfere with application and adherence. Which formulation is most suitable?
28.
Kalonji (Nigella sativa) has been investigated for possible medicinal effects on which type of parameters?
29.
A patient with predominantly comedonal acne is started on a topical agent that normalizes follicular epithelial turnover. Which drug has this action?
30.
A patient with severe psoriasis is prescribed an oral retinoid. Which drug is strongly associated with prolonged teratogenic risk after treatment?
31.
A patient with chronic cardiovascular disease asks about taking Coenzyme Q10. The clinician explains that the supplement participates naturally in mitochondrial energy production and has been studied as supportive therapy in selected cardiovascular conditions. Which clinical use is most consistent with this rationale?
32.
A bedridden patient develops moist irritation in a skin fold where friction and retained moisture worsen the lesion. Which formulation is most useful when the aim is to absorb moisture and reduce friction?
33.
A teenager with inflammatory acne is prescribed benzoyl peroxide. What is its principal antibacterial mechanism?
34.
Activation of platelets leads to release of thromboxane A₂. Which effect is most characteristic of this mediator?
35.
During platelet activation, one locally generated eicosanoid amplifies hemostasis by recruiting additional platelets and constricting nearby vessels. Which biochemical pathway produces this mediator?
36.
A patient with diabetes begins taking ginseng while continuing glucose-lowering medication. Which adverse outcome should be considered?
37.
Arachidonic acid is metabolized through the cyclooxygenase pathway. Which group is formed through this pathway?
38.
A 58-year-old patient with open-angle glaucoma is prescribed a drug that lowers intraocular pressure mainly by increasing aqueous humor outflow. Which drug is most appropriate?
39.
A patient treated for glaucoma notices gradual darkening of the iris and increased eyelash growth after several months of therapy. Which drug is most likely responsible?
40.
A 42-year-old patient with pulmonary arterial hypertension is prescribed a prostacyclin-related drug. Improvement occurs through pulmonary vasodilation together with inhibition of platelet aggregation. Which mediator is being pharmacologically mimicked?
