Benzoyl Peroxide Clindamycin Drug Interactions: What to Avoid and What to Tell Your Doctor

Benzoyl peroxide/clindamycin is applied directly to the skin, which means it doesn't interact with most oral medications the way systemic drugs do. That said, there are important interactions to know about — both with other topical products and, in rare cases, with drugs that can affect the clindamycin component.

Here's a complete rundown of what to avoid and what your doctor needs to know before you start treatment.

Does Benzoyl Peroxide/Clindamycin Interact With Oral Medications?

Because very little of the medication enters the bloodstream, systemic drug interactions are uncommon. However, there are a few notable exceptions:

Neuromuscular blocking agents — Clindamycin has neuromuscular blocking properties and may enhance the effects of drugs like rocuronium, vecuronium, or succinylcholine. If you're having surgery or are on any of these medications, alert your surgical team and prescriber. Although this is more of a concern with oral or IV clindamycin, it should still be disclosed.

Erythromycin — Do not use topical erythromycin or erythromycin-containing products (like Benzamycin) at the same time as benzoyl peroxide/clindamycin. In vitro studies show antagonism between clindamycin and erythromycin — meaning they can interfere with each other's effectiveness. Avoid any combination that includes both antibiotics.

What Topical Products Should I Avoid Using Alongside This Medication?

Using other topical products at the same time as benzoyl peroxide/clindamycin can cause cumulative skin irritation. This includes:

Other topical acne treatments — Retinoids (tretinoin, adapalene), salicylic acid, azelaic acid, and other antibiotics can all increase skin irritation when used with this combination. If you're using multiple actives, ask your dermatologist how to space them out.

Dapsone (Aczone) — Using topical dapsone on the same areas as benzoyl peroxide/clindamycin can cause temporary yellow or orange discoloration of the skin and hair due to a chemical reaction between the two ingredients. While not dangerous, it's worth noting.

Peeling, desquamating, or abrasive agents — Products containing glycolic acid, AHAs/BHAs, physical exfoliants, or strong toners can compound skin irritation. If irritation becomes significant, reduce frequency or temporarily pause treatment.

Harsh cleansers and skin products with alcohol — Alcohol-based toners, astringents, harsh soaps, hair removal waxes, and skin products with lime or spices can all worsen irritation and dryness.

PABA-containing sunscreens — Applying sunscreen containing PABA (para-aminobenzoic acid) to skin treated with benzoyl peroxide can cause discoloration. Choose a PABA-free, non-comedogenic sunscreen instead.

Are There Photosensitivity Interactions to Be Aware Of?

Yes. Benzoyl peroxide increases your skin's sensitivity to UV light. A few interactions worth knowing:

Verteporfin — Used in photodynamic therapy; combining with BPO may increase photosensitizing effects. Use with caution or avoidance as directed by your provider.

Aminolevulinic acid (oral or topical) — Avoid phototoxic drugs including BPO for 24 hours before and after aminolevulinic acid administration.

Methoxsalen — Used in PUVA therapy; BPO may enhance photosensitizing effects. Use with caution.

In general, minimize sun exposure while using benzoyl peroxide/clindamycin. Wear SPF 30+ sunscreen daily and avoid tanning beds.

What Medical Conditions Should I Disclose to My Doctor?

Certain health conditions make this medication risky or contraindicated. Always disclose:

History of ulcerative colitis or Crohn's disease (regional enteritis) — Clindamycin-containing products are contraindicated in patients with these conditions due to the risk of severe colitis.

History of antibiotic-associated colitis or pseudomembranous colitis — If you've had serious bowel complications from antibiotics in the past, this medication may be contraindicated.

Allergy to clindamycin, lincomycin, or benzoyl peroxide — Known hypersensitivity to any component is a contraindication.

Pregnancy or breastfeeding — Safety in pregnancy and breastfeeding has not been established. Discuss risks and benefits with your provider.

Sensitive skin or existing skin conditions — Let your prescriber know if you have eczema, rosacea, or very sensitive skin, as the medication may require more gradual introduction.

Can I Use Sunscreen With Benzoyl Peroxide/Clindamycin?

Yes — and you should. Since this medication increases sun sensitivity, daily sunscreen use is important. Just choose a PABA-free, non-comedogenic sunscreen with SPF 30 or higher. Apply sunscreen after the gel has been absorbed into the skin.

What Should I Tell My Doctor or Pharmacist?

Before starting benzoyl peroxide/clindamycin, give your provider a complete list of:

All prescription medications (including oral and topical)

Over-the-counter skincare products, especially other acne treatments

Vitamins, supplements, and herbal products

Any upcoming surgical procedures (relevant to neuromuscular blocking agents)

Your full medical history, especially any gastrointestinal conditions

The Bottom Line on Drug Interactions

Benzoyl peroxide/clindamycin has a limited systemic interaction profile because so little of it enters the bloodstream. The interactions you do need to worry about are mostly topical — using other irritating products on the same skin. The most important drug-level interaction to avoid is erythromycin. And always disclose any history of bowel disease to your provider. For a full picture of what to expect from this medication, read our guide on benzoyl peroxide/clindamycin side effects. And if you need help finding your prescription at a pharmacy near you, Medfinder is here to help.