Clindamycin vs benzoyl peroxide for acne: how they differ and why they're paired

If you’ve been handed a clindamycin gel and a benzoyl peroxide (BPO) wash and wondered why you need both, or you’re weighing up whether drugstore benzoyl peroxide is enough, this guide explains how each works, what the evidence says, and how to use them without wrecking your skin or your towels.

Skin Realist check: think of clindamycin as the specialist and benzoyl peroxide as the bodyguard. The specialist is good at the job, but without the bodyguard, the bacteria learn its moves.

What’s the difference between clindamycin and benzoyl peroxide?

	Clindamycin	Benzoyl peroxide
What it is	Topical antibiotic	Antiseptic (an oxidizing agent)
How you get it (US)	Prescription only	Over the counter at 2.5% to 10%
Common forms	1% gel, lotion or solution; combination gels	Washes, gels, creams, leave-on treatments
What it does	Reduces acne-causing bacteria	Reduces acne-causing bacteria, including antibiotic-resistant strains
2024 AAD guideline	Strong recommendation, but not as monotherapy	Strong recommendation
Main downsides	Bacterial resistance; dryness, redness; rare colitis warning	Bleaches fabric; dryness, peeling, irritation

Sources: 2024 AAD guidelines, FDA OTC acne monograph, clindamycin gel prescribing information.

Why does clindamycin need benzoyl peroxide?

Because of antibiotic resistance. A 2016 systematic review in The Lancet Infectious Diseases found that, in people with acne, 18.8% of acne bacteria strains tested were already resistant to clindamycin. It also reported that topical clindamycin used alone increased the count of resistant bacteria to more than 1,600% of baseline by week 16, while resistant counts fell only in the group using clindamycin with benzoyl peroxide.

The review explains why: benzoyl peroxide rapidly reduces both sensitive and resistant strains of acne bacteria where it’s applied. Its authors recommend that topical antibiotics never be used alone, and that topical and oral antibiotics are never used at the same time.

The 2024 AAD guidelines say the same in their own words: topical antibiotics get a strong recommendation, with the remark that “topical antibiotic monotherapy is not recommended”. The AAD’s patient guide says that if you’re prescribed a topical antibiotic, you’ll use it along with a medication or wash containing benzoyl peroxide, which reduces your risk of developing antibiotic resistance.

How well does each one work?

Both are first-line acne treatments. The 2024 guidelines give benzoyl peroxide, topical antibiotics, and a fixed-dose combination of the two each a strong recommendation with moderate certainty of evidence. They also recommend multimodal therapy, meaning combining treatments that work in different ways, rather than relying on one product.

That’s why clindamycin often turns up alongside a retinoid. The guidelines strongly recommend fixed combinations of a retinoid with an antibiotic (with benzoyl peroxide used as well) and of a retinoid with benzoyl peroxide. The AAD says retinoids work to clear pores and treat blackheads and whiteheads, so they cover a part of acne the other two aren’t aimed at. In October 2023 the FDA approved Cabtreo, a once-daily gel combining clindamycin phosphate 1.2%, adapalene 0.15% and benzoyl peroxide 3.1%, for people 12 and older; Bausch Health describes it as the first triple-combination topical acne treatment approved in the US.

If you’re starting from scratch, see OTC acne treatments compared for where benzoyl peroxide fits among the options you can buy, and prescription acne treatments for what a dermatologist can add.

What are the side effects?

Clindamycin

From the prescribing information for clindamycin phosphate gel 1%:

• The most common reactions in the clinical trial were dryness (23% of people using the gel), redness, burning, itching and oiliness.
• It’s not for people with a history of regional enteritis, ulcerative colitis or antibiotic-associated colitis.
• Clindamycin taken by mouth or injection has been linked to severe colitis. The label says to stop the gel if significant diarrhea occurs. Tell your doctor straight away if that happens.
• The label directs a thin film twice daily, though combination products have their own directions. Follow your prescription.

Benzoyl peroxide

• It bleaches fabric. The AAD says rinsing it off after use helps protect clothes, sheets and towels.
• Dryness and peeling are common. The AAD notes a 5.3% product is less likely to irritate than higher strengths, and that 10% is the strongest you can buy without a prescription.
• Benzene: in March 2025 the FDA tested 95 benzoyl peroxide acne products and six had elevated benzene levels and were recalled. The FDA said more than 90% had undetectable or extremely low levels, that the cancer risk is very low, and that consumers should throw away expired products.

Skin Realist check: the fastest way to tell who in a house uses benzoyl peroxide is to look at the pillowcases. White linens are cheaper than arguments.

How do you use clindamycin and benzoyl peroxide together?

1. Follow your prescription first. A combination gel replaces separate products. If you were given two, ask whether to use them at the same time of day or at different times.
2. Apply a thin layer to the whole area, not just individual spots. The AAD says applying more than recommended won’t clear acne faster.
3. Use a benzoyl peroxide wash if leave-on gels are too drying or bleaching. On the back, the AAD says leaving a BPO wash on for two to five minutes before rinsing helps it work.
4. Moisturize with a simple, fragrance-free lotion to offset dryness.
5. Wear sunscreen in the morning, especially if your routine includes a retinoid.
6. Give it 6 to 8 weeks before judging, per the AAD.

Products to support either treatment

Neither of these treats acne, but both are recorded as fragrance free and suit a routine built around drying actives.

CeraVe PM Facial Moisturizing Lotion is a lightweight, oil-free night lotion with niacinamide, three ceramides and hyaluronic acid. It’s a good buffer on evenings when your skin feels tight from treatment. → Check price on Amazon

CeraVe Hydrating Mineral Sunscreen SPF 30 Face Lotion lists titanium dioxide 6% and zinc oxide 5%, with ceramides and niacinamide, for broad-spectrum SPF 30. Mineral sunscreens can leave a white cast on deeper skin tones. → See it on Amazon

For more options, see the best moisturizers for acne-prone skin.

What mistakes should you avoid?

• Using clindamycin on its own once the benzoyl peroxide runs out. That’s the pattern the resistance research warns about.
• Combining a topical antibiotic with an oral one without your dermatologist’s say-so. The Lancet review recommends never using them together.
• Spot-treating only. Acne treatments work by preventing new spots across the area.
• Quitting at week three because nothing’s changed yet.
• Piling on extra acne actives. More products mostly means more irritation. See building an acne routine.

When should you see a dermatologist?

Clindamycin is prescription-only, so you’ll need a clinician to get it. It’s worth booking if over-the-counter benzoyl peroxide hasn’t helped after 6 to 8 weeks, or straight away if you have deep, painful nodules or cysts, which over-the-counter products can’t clear. See when to see a dermatologist for acne.

The bottom line

Clindamycin and benzoyl peroxide aren’t rivals. Clindamycin is a useful prescription antibiotic but shouldn’t be used alone, because acne bacteria can become resistant to it. Benzoyl peroxide is available over the counter, kills resistant strains, and is what keeps clindamycin working. If you’re starting out, over-the-counter benzoyl peroxide is a sensible first step. If you’ve been prescribed clindamycin, use it with the benzoyl peroxide your doctor recommends.

Sources

• 2024 AAD acne guidelines: strong recommendations for benzoyl peroxide, topical antibiotics and fixed combinations; topical antibiotic monotherapy not recommended; multimodal therapy.
• AAD: How dermatologists treat acne: pairing topical antibiotics with benzoyl peroxide to reduce resistance; 6 to 8 weeks; more medication doesn’t work faster.
• Walsh et al., 2016, Lancet Infect Dis: clindamycin resistance rates, resistance increase with clindamycin alone, benzoyl peroxide effect on resistant strains.
• Clindamycin phosphate gel 1% prescribing information: prescription status, contraindications, colitis warning, common reactions, dosing.
• FDA OTC acne monograph M006: legal over-the-counter strengths of benzoyl peroxide.
• AAD: Back acne: benzoyl peroxide strengths, fabric bleaching and wash contact time.
• Bausch Health, October 2023: FDA approval of the clindamycin, adapalene and benzoyl peroxide triple-combination gel.
• FDA, March 2025: benzene testing of benzoyl peroxide acne products.

This guide is general education, not medical advice. Product facts come from each brand’s label as recorded on its product page. We haven’t tested these products.