Acne is treated with a combination of topical products, oral medications, or both, depending on how severe it is. Mild acne often responds to over-the-counter creams and washes, while moderate to severe breakouts typically require prescription-strength topicals, antibiotics, hormonal therapy, or isotretinoin. Most treatments take at least four to six weeks to show noticeable improvement.
Topical Treatments for Mild to Moderate Acne
For most people, treatment starts with products applied directly to the skin. The three most common active ingredients work in different ways, and they’re often used together for better results.
Benzoyl peroxide kills acne-causing bacteria on the skin and has mild anti-inflammatory effects. It’s available over the counter in strengths ranging from 2.5% to 10%, though higher concentrations aren’t necessarily more effective. They do tend to cause more dryness and irritation. One of benzoyl peroxide’s most important roles is preventing bacteria from becoming resistant to antibiotics, which is why it’s almost always paired with antibiotic treatments.
Salicylic acid works by dissolving the buildup of dead skin cells inside pores. A 2% wash is moderately effective for mild breakouts, though it’s less potent than retinoids for keeping pores clear.
Retinoids are the backbone of acne treatment. They speed up skin cell turnover, which prevents dead cells from clogging pores and helps existing breakouts resolve faster. Adapalene 0.1% gel became available over the counter in 2016 for anyone 12 and older, making it the first retinoid you can buy without a prescription. Stronger formulations, including adapalene 0.3% gel and other retinoids like tretinoin and tazarotene, still require a prescription. Among prescription retinoids, tazarotene appears to be the most potent. In head-to-head comparisons, once-daily tazarotene reduced papules and open comedones more effectively than once-daily tretinoin, and achieved comparable results to adapalene even when applied only every other day instead of daily.
For the best results, dermatologists often prescribe combination products that include a retinoid, benzoyl peroxide, and an antibiotic in a single gel. In clinical trials, a triple-combination gel reduced inflammatory lesions by 54 to 55% and non-inflammatory lesions by 43 to 45% within just four weeks.
Oral Antibiotics for Inflammatory Acne
When acne is moderate to severe with red, inflamed bumps and deeper lesions, oral antibiotics are a common next step. Doxycycline and minocycline, both in the tetracycline family, are the most frequently prescribed options. Both can be taken once daily with or without food, and minocycline is typically dosed based on body weight.
Clinical trials have tested these antibiotics over treatment periods ranging from 12 to 24 weeks, with many patients seeing meaningful improvement by the 12-week mark. The key rule with oral antibiotics is that they should never be used alone. Antibiotic monotherapy increases the risk of bacterial resistance, so they’re always combined with benzoyl peroxide or a topical retinoid. They’re also not meant for long-term use. The typical course runs a few months, after which you transition to topical treatments for maintenance.
Hormonal Therapy for Adult Women
Hormonal acne, which often shows up along the jawline and chin, responds well to treatments that target the hormonal drivers behind breakouts. This approach is only used in women and people assigned female at birth.
Three birth control pills are FDA-approved specifically for treating moderate to severe acne: Ortho Tri-Cyclen, Estrostep Fe, and Yaz. They’re approved for adolescents 15 and older (14 and older for Yaz) who have started menstruating and also want contraception. These pills work by reducing the circulating androgens that stimulate oil production in the skin.
Spironolactone is the other major hormonal option, used off-label at doses of 50 to 200 mg per day. In a six-month trial of 133 women with moderate acne, spironolactone at 150 mg daily reduced acne scores by 62%, compared to 32% with doxycycline. A separate trial of 410 women found that 50 to 100 mg daily significantly improved acne-related quality of life within 12 weeks. In adolescents, a median dose of 100 mg per day produced a complete response in about 22.5% of patients, with initial improvement typically visible within three months. The most common side effects are increased urination (around 29% of users) and menstrual irregularities (about 22%), though combining spironolactone with certain birth control pills can reduce menstrual side effects.
Isotretinoin for Severe or Resistant Acne
Isotretinoin is the most powerful acne treatment available and the only one that can produce long-term remission after a single course. It’s reserved for severe, scarring, or treatment-resistant acne because of its significant side effect profile, which includes extreme skin dryness, potential mood changes, and the risk of serious birth defects during pregnancy.
A standard course targets a cumulative dose of 120 to 150 mg/kg of body weight, which usually takes five to seven months to complete. Dosing matters for long-term results. In one study of patients with severe cystic acne, those on higher daily doses (1 mg/kg) had a relapse rate of only 10% over 18 months, while those on very low doses (0.1 mg/kg) relapsed 42% of the time. A large study of 638 patients using a moderate daily dose of 20 mg for 24 weeks reported good results in about 94% of patients, with only a 5% relapse rate over four years. Lower doses tend to cause fewer side effects and higher patient satisfaction, but the tradeoff is a somewhat higher chance of needing a second course.
In-Office Procedures
Professional procedures can complement a topical or oral regimen, though they’re rarely used as standalone treatments for active acne. Light chemical peels using glycolic acid or salicylic acid remove the outermost layer of skin, helping to unclog pores and improve skin texture. These are superficial peels with minimal downtime, and results build with repeated sessions. Medium-depth peels, which use trichloroacetic acid (sometimes combined with glycolic acid), penetrate deeper and are more commonly used for acne scars rather than active breakouts.
Light and laser therapies are another option, particularly for inflammatory acne that hasn’t responded well to topicals alone. These work by targeting bacteria or reducing oil gland activity, though they typically require multiple sessions.
What to Expect in the First Weeks
One of the biggest reasons people abandon acne treatment is impatience. At the four-week mark, even the most effective topical combinations reduce lesion counts by only about 30 to 55%. Treatment success rates at week four (defined as clear or almost clear skin) range from just 3 to 12%. Full results from topical treatments and oral antibiotics generally take 8 to 12 weeks, and some patients don’t see their best results until the four- to six-month mark.
If you’re starting a retinoid, expect a “purging” phase where your skin temporarily looks worse before it improves. This happens because the retinoid accelerates skin cell turnover, pushing clogged pores to the surface faster. Purging typically lasts four to six weeks. If it continues beyond six weeks or steadily worsens, that’s worth discussing with your dermatologist. During this phase, moisturizer and daily sunscreen are essential. Look for moisturizers with ceramides, which help repair the skin barrier while your skin adjusts to treatment. Purging skin is more sensitive to sun damage, so skipping SPF can lead to dark marks that outlast the breakouts themselves.
Building a Treatment Plan by Severity
Acne treatment follows a stepwise approach. For mild acne with mostly blackheads and whiteheads, an over-the-counter adapalene gel combined with a benzoyl peroxide wash is a reasonable starting point. If that’s not enough after two to three months, a prescription-strength retinoid or a combination topical is the next step.
Moderate acne with inflamed bumps and pustules usually requires a prescription combination topical plus a short course of oral antibiotics. Women with hormonal patterns may benefit from adding birth control or spironolactone at this stage.
Severe or scarring acne, or acne that has failed multiple treatments, is where isotretinoin becomes the most effective option. Because of its monitoring requirements and side effects, it’s prescribed through a regulated program, but for the right candidates, it offers the best chance at lasting clearance.