- Acne medicamentosa
Acne medicamentosa (commonly referred to as drug-induced acne) is acne that is caused or aggravated by medication. Because acne is generally a disorder of the pilosebaceous units caused by hormones, the medications that trigger acne medicamentosa most frequently are hormone analogues. It is also often caused by corticosteroids; in this case, it is referred to as steroid acne.
Although the masculinizing hormone testosterone is most often blamed, and although men with acne secondary to bodybuilding hormones are seen from time to time, the major hormonal medications that causes acne are the progestin analogues present in hormonal contraception. Other medications can produce acneiform eruptions (usually pimply bumps and pustules that look like acne).
Some conditions mimic acne medicamentosa. The most common mimic is folliculitis produced by an overgrowth of the Malassezia species, often secondary to oral or systemic corticosteroids, or secondary to broad-spectrum antibiotics such as the tetracycline family used in acne. This is often misinterpreted as 'tetracycline-resistant acne'.
ReferencesFollicular cystsUngroupedAcrokeratosis paraneoplastica of Bazex · Acroosteolysis · Bubble hair deformity · Disseminate and recurrent infundibulofolliculitis · Erosive pustular dermatitis of the scalp · Erythromelanosis follicularis faciei et colli · Hair casts · Hair follicle nevus · Intermittent hair–follicle dystrophy · Keratosis pilaris atropicans · Kinking hair · Koenen's tumor · Lichen planopilaris · Lichen spinulosus · Loose anagen syndrome · Menkes kinky hair syndrome · Monilethrix · Parakeratosis pustulosa · Pili (Pili annulati · Pili bifurcati · Pili multigemini · Pili pseudoannulati · Pili torti) · Pityriasis amiantacea · Plica neuropathica · Poliosis · Rubinstein–Taybi syndrome · Setleis syndrome · Traumatic anserine folliculosis · Trichomegaly · Trichomycosis axillaris · Trichorrhexis (Trichorrhexis invaginata · Trichorrhexis nodosa) · Trichostasis spinulosa · Uncombable hair syndrome · Wooly hair · Wooly hair nevus
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