Real-world adherence to topical therapies in patients with moderate acne.

Background: Real-life data on topical treatments in daily practice in patients with moderate acne are poorly characterized.

Objective: To investigate the drug survival of topical treatments administered to patients with moderate acne in a daily practice.

Methods: Survival analysis was performed on subjects (Belgian university hospital and private practice outpatient dermatology patients) with moderate acne who received topical therapies according to the current published guidelines.

Results: A total of 1160 treatment series (1029 patients) were included, including benzoyl peroxide (BPO, n = 93), azelaic acid (n = 246), adapalene (n = 254), a fixed combination of adapalene 0.1% and BPO 2.5% (A/BPO, n = 264), and a fixed combination of clindamycin 1.2% and tretinoin 0.025% gel (Clin-RA, n = 303). The calculated overall median treatment duration of all drugs was 2 months. The probability of treatment discontinuation after only 3 months was 50%. Overall, the drugs were discontinued for the following reasons: controlled acne (9%), side effects (9%), ineffectiveness (52%), combination of side effects and ineffectiveness (3%), and other reasons (1%). Overall, 27% patients were lost to follow-up.

Limitations: The post hoc study design and generalizability limit interpretation of the data.

Conclusion: Overall, the median treatment duration of topical anti-acne therapies was short (2 months). The main reason for discontinuation was ineffectiveness.