Dapsone (Aczone) is a topical gel that's used for acne. This medication belongs to the drug class known as sulfones. It's available in two strengths: dapsone 7.5% (for people 9 years and older) and dapsone 5% (for people 12 years and older). Dapsone (Aczone) is applied onto the skin once or twice a day, depending on which strength you're using. The most common side effects include redness and dryness where you apply it. Dapsone (Aczone) is available as a generic and brand-name medication.
Dapsone (Aczone) is a sulfone antibiotic. It's unknown how it helps with acne, but it likely lowers the number of acne-causing bacteria and and lessens inflammation on the skin.
Source: DailyMed
Side effects that you should report to your care team as soon as possible:
Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):
Applied directly to the area of skin with acne
Works well with minimal side effects
Once- or twice-daily dosing (depending on the strength you have)
Available as a lower-cost generic
Might take up to 3 months to see full effects
Might not be right for you if you take certain medications, have glucose-6-phosphate dehydrogenase (G6PD) deficiency, or have certain blood conditions such as methemoglobinemia
Unknown if it's safe to use while pregnant or breastfeeding
Before you apply dapsone (Aczone), gently wash the affected areas and pat them dry.
Only apply dapsone (Aczone) on your skin. Don't place the gel in your mouth, eyes, or genitals (e.g., vagina) to avoid side effects.
You might notice particles (solid pieces) in the gel or feel grittiness on your skin after you apply dapsone (Aczone). This is normal. Try to rub the medication in as best as you can.
Wash your hands each time after you apply dapsone (Aczone). This helps prevent getting medication into your eyes or onto other areas of your body.
Talk to your primary care provider or dermatologist if you don't notice an improvement in your acne within 3 months of using dapsone (Aczone). They can discuss alternative treatment options.
Using other acne medications, like benzoyl peroxide, after you've applied dapsone (Aczone) might cause your skin or facial hair to turn a yellow or orange color. This is temporary.
Store dapsone (Aczone) at room temperature. Don't let the gel freeze or keep it in the freezer because this could damage the medication.
Dapsone (Aczone) can cause some serious health issues. This risk may be even higher for certain groups. If this worries you, talk to your doctor or pharmacist about other options.
Risk factors: History of methemoglobinemia | History of low glucose-6-phosphate dehydrogenase (G6PD)
Some people who used dapsone (Aczone) reported developing a rare, but serious blood condition called methemoglobinemia. With this blood problem, your red blood cells can't bring enough oxygen throughout your body. Your risk is higher if you have a genetic condition known as glucose-6-phosphate dehydrogenase (G6PD) deficiency. Get medical help right away if you notice your lips, inside of your mouth, or nails turning bluish or grayish.
Risk factors: G6PD deficiency | Taking antimalarial medications, dapsone tablets, or sulfamethoxazole/trimethoprim
There might be a risk for low red blood cell counts (hemolytic anemia) with dapsone (Aczone). This is when your red blood cells get destroyed faster than your body can make new ones.
In general, your risk for hemolytic anemia is higher if you have a genetic condition called glucose-6-phosphate dehydrogenase (G6PD) deficiency. Avoid using dapsone (Aczone) if you're taking dapsone tablets, antimalarial medications, or the antibiotic Bactrim or Septra (sulfamethoxazole / trimethoprim). These medications can put you at risk for low red blood cells.
Let your primary care provider know if you experience dark urine, tiredness, weakness, dizziness, or pale skin, as these can be signs of hemolytic anemia.
Dapsone 5% gel (Aczone): Apply a pea-sized amount as a thin layer to the areas of your skin that have acne. Apply the 5% gel twice a day.
Dapsone 7.5% gel (Aczone): Apply a pea-sized amount as a thin layer to the areas of your skin that have acne. Apply the 7.5% gel once a day.
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Almirall, LLC. (2024). Aczone- dapsone gel [package insert]. DailyMed.
Coutinho, B., et al. (2010). Dapsone (Aczone) 5% gel for the treatment of acne. American Family Physician.
Encube Ethicals Private Limited. (2023). Dapsone- dapsone gel, 5% gel [package insert]. DailyMed.
Gerber, G. F., et al. (2024). Glucose-6-phosphate dehydrogenase (G6PD) deficiency. Merck Manual Consumer Version.
Hauk, L. (2017). Acne vulgaris: Treatment guidelines from the AAD. American Family Physician.
MedlinePlus. (2022). Methemoglobinemia.
MedlinePlus. (2024). Glucose-6-phosphate dehydrogenase deficiency.
National Heart, Lung, and Blood Institute. (2022). Hemolytic anemia.
Wozel, G., et al. (2014). Dapsone in dermatology and beyond. Archives of Dermatological Research.
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