Dermatologist Certificate Dermatopharmacology and Topical Therapy

Question 1

Which topical retinoid is considered the gold standard for treating photodamage and acne?

Accepted Answer

Tretinoin (all-trans retinoic acid)

Answer

Adapalene

Answer

Tazarotene

Answer

Retinol

Question 2

What is the vehicle that determines the potency classification of topical corticosteroids?

Accepted Answer

The formulation (ointment > gel > cream > lotion > solution) significantly affects potency

Answer

Concentration alone determines potency

Answer

Molecular weight of the steroid

Answer

pH of the preparation

Question 3

Calcineurin inhibitors (tacrolimus and pimecrolimus) are used as steroid-sparing agents for which condition?

Accepted Answer

Atopic dermatitis, especially on the face and intertriginous areas

Answer

Psoriasis plaques on the trunk

Answer

Actinic keratoses

Answer

Seborrheic dermatitis

Question 4

What is the primary mechanism by which benzoyl peroxide treats acne?

Accepted Answer

Releases free oxygen radicals that are bactericidal against Cutibacterium acnes

Answer

Inhibits 5-alpha reductase reducing sebum production

Answer

Blocks androgen receptors in sebaceous glands

Answer

Modulates toll-like receptor 2 signaling

Question 5

Which topical medication is first-line treatment for rosacea-associated papulopustular lesions?

Accepted Answer

Metronidazole 0.75–1% gel or cream

Answer

Clindamycin 1% solution

Answer

Erythromycin 2% gel

Answer

Dapsone 5% gel

Question 6

Salicylic acid functions as a keratolytic agent by what mechanism?

Accepted Answer

Disrupts intercellular lipid bilayers causing desquamation of the stratum corneum

Answer

Inhibits prostaglandin synthesis reducing inflammation

Answer

Chelates calcium ions disrupting desmosomes

Answer

Activates proteases that cleave corneodesmosin