A topical fixed-dose combination gel indicated for the treatment of acne vulgaris. Dapsone, a sulfone antibiotic, exerts anti-inflammatory and antimicrobial effects, while Adapalene, a third-generation topical retinoid, normalizes follicular keratinization and reduces inflammation. This combination targets multiple pathogenic factors of acne: hyperkeratinization, *Cutibacterium acnes* proliferation, and inflammation.
Adult: Apply a thin film to the entire affected area(s) once daily, in the evening, on clean, dry skin.
Note: 1. Wash face gently with a mild cleanser and pat dry. 2. Dispense a pea-sized amount onto fingertips. 3. Dot onto forehead, cheeks, nose, and chin. 4. Spread a thin, uniform film over the entire affected area. 5. Avoid eyes, lips, nostrils, mucous membranes, and areas of eczema or broken skin. 6. Wash hands after application. 7. May be used with a non-comedogenic moisturizer to manage dryness.
The combination provides complementary mechanisms targeting multiple etiological factors of acne vulgaris. Dapsone inhibits neutrophil chemotaxis and the myeloperoxidase-H2O2-halide-mediated cytotoxic system, reducing inflammation. It also has bacteriostatic activity against *C. acnes*. Adapalene binds to specific retinoic acid nuclear receptors (RAR-β and RAR-γ), normalizing the differentiation of follicular keratinocytes, reducing microcomedone formation, and exerting anti-inflammatory effects by inhibiting toll-like receptor-2 (TLR-2) and AP-1 pathways.
Pregnancy: Category C. Adapalene is teratogenic in animals at high oral doses. Systemic exposure from topical use is minimal. However, due to the retinoid component and lack of adequate human studies, use during pregnancy is not recommended, especially during the first trimester. Use only if potential benefit justifies potential risk.
Driving: No effect on ability to drive or use machines.
| Topical Benzoyl Peroxide | Concomitant application can cause temporary local yellow or orange discoloration of skin and hair due to oxidation of Dapsone. Not contraindicated but may be cosmetically unacceptable. | Moderate |
| Other Topical Retinoids (Tretinoin, Tazarotene) or Keratolytics (Salicylic Acid) | Increased risk of severe skin irritation, dryness, and peeling. Avoid concurrent use on same areas. | Major |
| Oral Dapsone or Sulfonamides | Potential for additive systemic effects and increased risk of adverse reactions, including hemolytic anemia and methemoglobinemia. | Major |
| Photosensitizing Drugs (e.g., Tetracyclines, Fluoroquinolones, Thiazides) | Potential additive photosensitivity risk. Advise enhanced sun protection. | Moderate |
Same composition (Dapsone (5% w/w) + Adapalene (0.1% w/w)), different brands: