The 2026 review of systemic acne drugs speaks mainly to adult women, not to teens with inflammatory acne — red, tender pimples, pustules and lumps. Spironolactone was studied mainly in adult women, metformin in PCOS or insulin resistance, and bicalutamide only as early signals in women. Teen boys were essentially not studied in this hormonal-treatment evidence. Teen girls were also largely outside it, except for small metformin studies in girls with PCOS.
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Table of Contents
- What the 2026 review showed in adult women
- Why teen boys are outside this evidence
- Where does metformin fit for teens?
- Why bicalutamide is not a teen option
What the 2026 review showed in adult women
Dermatology Times, summarizing the 2026 narrative review, reports spironolactone shows strong efficacy in adult women and can outperform doxycycline, while combined birth-control pills approach antibiotic efficacy by 6 months the Dermatology Times summary. That comparison matters because doxycycline is a common oral antibiotic for inflamed breakouts.
The University of Southampton SAFA trial page gives the clearest adult-women test: 410 women aged 18 and older with persistent facial acne took 50-100 mg of spironolactone daily and improved more than placebo at 12 and 24 weeks the SAFA study page. No teens were in that trial by design.
Why teen boys are outside this evidence
At AAD 2026, Brigham acne director John Barbieri said spironolactone's antiandrogen action means it is generally usable only in women with acne, excluding teen boys and men, according to Managed Healthcare Executive's AAD report. That limit removes spironolactone as a routine choice for boys with inflamed breakouts.
Medscape's summary of AAD 2024 guidance notes the guidelines cover ages 9 and older but only conditionally recommend spironolactone and combined contraceptives. Strong recommendations stay with benzoyl peroxide, retinoids and isotretinoin. For a teen boy, being in the age range does not open hormonal options.
Where does metformin fit for teens?
The same 2026 review found metformin helps acne tied to PCOS or insulin resistance by lowering IGF-1 and androgen signaling, as described by Dermatology Times. That makes metabolic signs a practical way to sort who might benefit.
An NIH PMC and JCAD review traces teen metformin evidence mainly to small PCOS studies. One study gave 36 adolescent females 500 mg three times daily for 6 months and saw significant acne improvement with p equals 0.003. Teens without PCOS or insulin resistance, and teen boys, were not the focus.
Why bicalutamide is not a teen option
A Journal of Cutaneous and Aesthetic Surgery review describes bicalutamide as an androgen-receptor blocker with early signals for acne and excess hair growth in women. The same review calls for larger randomized trials and liver-function monitoring. The FDA bicalutamide label gives the practical limit: pregnancy must be avoided during use because of feminization risk to a male fetus, according to the FDA bicalutamide label.
The label also shows no approved use in women or children. Spironolactone carries the same pregnancy-avoidance concern for teen girls. Liver-function monitoring is part of the bicalutamide discussion in adult-women reviews. For teens with inflamed breakouts, that drug remains unproven and unapproved for their age group.
- ask whether PCOS or insulin resistance has been evaluated
- review pregnancy-prevention needs before any antiandrogen talk
- ask what studied options fit the age 9 and older guidance
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