A recent real-world study from Shanghai reveals that patients using oral antibiotics for moderate-to-severe acne for longer periods face a significantly higher risk of their acne returning and developing antibiotic resistance. The research, which analyzed data from 240 patients treated between 2020 and 2023, shows that extended antibiotic courses, lasting 17 to 24 weeks, nearly doubled the recurrence rate compared to shorter treatments.This finding highlights growing concerns among dermatologists about the overuse of systemic antibiotics in acne management.[daijiworld+2]
Study Reveals Clear Risks
Researchers divided patients aged 12 to 40 into three groups based on their treatment duration with doxycycline or minocycline: short-term (6–12 weeks), standard-term (13–16 weeks), and prolonged therapy (17–24 weeks). Each group included 80 individuals. The study's primary goal was to track acne recurrence within a year.[daijiworld+2]
The results showed a clear increase in acne recurrence as antibiotic use lengthened. Patients in the short-term group experienced a 12-month recurrence rate of 23.8%. This rate climbed to 35.0% for those on standard-term therapy and sharply rose to 46.3% for patients who underwent prolonged antibiotic treatment.[emjreviews+1]
The median time patients remained clear of acne also decreased with longer antibiotic exposure. For the short-term group, the median recurrence-free survival was 9.2 months. This dropped to 8.1 months for the standard group and further to 6.9 months for the prolonged therapy group. Statistical analysis confirmed that extended antibiotic use was an independent predictor of acne relapse.[daijiworld+5]
Despite these long-term drawbacks, the study found no significant difference in short-term outcomes across the groups. Approximately 75% of patients in each category achieved successful treatment after 12 weeks. There were also no major differences in scarring or adverse events, suggesting that longer antibiotic courses do not offer additional immediate benefits.[daijiworld+2]
However, the risk of antimicrobial resistance was notably higher with prolonged therapy. In a subset of patients tested, resistance to tetracycline antibiotics reached 42.9% in the prolonged group. This was significantly higher compared to the 13.3% to 17.6% resistance rates observed in the short- and standard-term groups.[daijiworld+2]
Expert Guidelines and Broader Concerns
Dermatology guidelines consistently recommend limiting the duration of oral antibiotic use for acne. The American Academy of Dermatology advises prescribing antibiotics for the shortest time possible, typically three to four months. The Primary Care Dermatology Society also suggests an ideal duration of three months, noting little additional benefit beyond this period for most patients. Some guidelines allow for treatment up to 24 weeks if clinical improvement continues, but generally discourage use beyond six months to minimize resistance development.[aad+2]
Experts stress that acne is not purely an infection, but a complex inflammatory condition. While antibiotics can reduce bacteria like Cutibacterium acnes and lessen inflammation, they should not be used as a standalone treatment. Combining oral antibiotics with non-antibiotic topical treatments, such as benzoyl peroxide or topical retinoids, is crucial. This combination therapy helps enhance efficacy and, importantly, reduces the risk of bacteria developing resistance.[healio+4]
Prolonged antibiotic use carries several other potential harms beyond resistance. It can disturb the body's natural microbiome, the community of "good" bacteria essential for health. This disruption may increase the risk of other infections, such as strep throat, and has been linked to a higher risk of inflammatory bowel disease. Some studies even suggest a potential association with increased risks of colon and breast cancers, though more research is needed.[aad+9]
Despite these well-established recommendations, real-world data indicates that many patients remain on oral antibiotics for acne far longer than advised. Some studies have found average durations exceeding 331 days, with a significant percentage of patients taking antibiotics for six months or longer, and even up to a year or more. This prolonged exposure contributes to the global challenge of antimicrobial resistance.[dresssyndromefoundation+3]
Future of Acne Treatment
The findings from the Shanghai study reinforce the urgent need for better antimicrobial stewardship in acne management. Dermatologists are encouraged to have an "exit plan" when initiating oral antibiotic treatment, discussing alternatives with patients from the outset. This includes transitioning patients to maintenance therapies like topical retinoids or benzoyl peroxide once their acne improves.[dermatologytimes]
Alternative systemic treatments, such as hormonal therapies like spironolactone or oral contraceptives for women, and oral isotretinoin for severe or resistant cases, are also vital options. Thesetreatments offer ways to manage acne effectively without relying on long-term antibiotic use. The goal is to provide effective, lasting acne control while safeguarding the effectiveness of antibiotics for more critical infections.[aad+8]
