Which agent is commonly used for acne vulgaris and is associated with skin dryness and irritation?

Which agent is commonly used for acne vulgaris and is associated with skin dryness and irritation?

• A. Hydrocortisone
• B. Clindamycin
• C. Erythromycin
• D. Benzoyl peroxide

Answer: (D)

Benzoyl peroxide is a common first-line option for acne because it works in two useful ways: it helps keep pores open (keratolytic and comedolytic action) and it directly reduces the bacteria that contribute to acne, Cutibacterium acnes. A characteristic feature of this agent is that it often causes skin dryness and irritation, especially when started at higher strengths or used with other drying products. This happens because its keratolytic action can strip surface oils and disrupt skin barriers, leading to itching, redness, and flaking. Because dryness and irritation are expected, the practical approach is to start with a lower concentration and pair use with a gentle moisturizer, gradually increasing intensity as tolerated. Benzoyl peroxide can be used alone or in combination with topical antibiotics to enhance effectiveness and help prevent antibiotic resistance, which is why it’s so frequently used in acne regimens. In contrast, hydrocortisone is a mild topical steroid and not a primary acne treatment; it may reduce inflammation temporarily but long-term use can worsen acne or cause skin thinning. Topical antibiotics like clindamycin or erythromycin are used for acne as well, but the hallmark side effect tied to the agent in question is specifically the drying, irritating effect of benzoyl peroxide, making it the best match for the description.

Benzoyl peroxide is a common first-line option for acne because it works in two useful ways: it helps keep pores open (keratolytic and comedolytic action) and it directly reduces the bacteria that contribute to acne, Cutibacterium acnes. A characteristic feature of this agent is that it often causes skin dryness and irritation, especially when started at higher strengths or used with other drying products. This happens because its keratolytic action can strip surface oils and disrupt skin barriers, leading to itching, redness, and flaking.

Because dryness and irritation are expected, the practical approach is to start with a lower concentration and pair use with a gentle moisturizer, gradually increasing intensity as tolerated. Benzoyl peroxide can be used alone or in combination with topical antibiotics to enhance effectiveness and help prevent antibiotic resistance, which is why it’s so frequently used in acne regimens.

In contrast, hydrocortisone is a mild topical steroid and not a primary acne treatment; it may reduce inflammation temporarily but long-term use can worsen acne or cause skin thinning. Topical antibiotics like clindamycin or erythromycin are used for acne as well, but the hallmark side effect tied to the agent in question is specifically the drying, irritating effect of benzoyl peroxide, making it the best match for the description.