The prevalence of clinically meaningful conjunctivitis in patients taking dupilumab for atopic dermatitis (AD) is likely about 2%, and it most often occurs in the first 16 weeks of therapy.
Those are key findings from an analysis of published trials of dupilumab for AD and other conditions that study author Matthew Zirwas, MD, presented during a late-breaking abstract session at the Revolutionizing Atopic Dermatitis (RAD) Virtual Conference.
Adults with AD have a significant and disease severity–dependent increased risk of developing ocular surface diseases, including conjunctivitis and keratitis, compared with the general population and independent of any drug effect, according to Dr. Zirwas, a dermatologist with Probity Medical Research of Columbus, Ohio.
Dupilumab inhibits signaling of interleukin (IL)-4 and IL-13, which drive type 2 inflammatory diseases such as AD, asthma, chronic rhinosinusitis with nasal polyposis (CRSwNP), eosinophilic esophagitis (EoE), prurigo nodularis (PN), and chronic spontaneous urticaria (CSU).
In randomized, placebo-controlled trials of dupilumab in patients with moderate to severe AD, conjunctivitis was reported in more patients who received dupilumab treatment than in placebo-treated patients.
"When it comes to dupilumab-induced conjunctivitis, we have a good idea of the etiology, but the question of how frequently it occurs versus how frequently the conjunctivitis is unrelated to dupilumab is an interesting one," he said. "How often is it clinically meaningful? What is it that is so unique about AD patients? We've all heard that it is a unique adverse event that only happens to people with AD and not to people using dupilumab for other indications. Where it gets interesting to me is how do we differentiate the cases that are dupilumab induced versus the cases that are just part of the underlying AD process?"
For their analysis, Dr. Zirwas and co-authors reviewed the incidence of conjunctivitis adverse events in patients from 15 completed, randomized, double-blind placebo-controlled trials evaluating dupilumab in AD, asthma, CRSwNP, EoE, PN, and CSU, along with the severity and resolution of conjunctivitis events in adults with AD.
Of the 15 trials, 7 were conducted in patients with AD: 4 in adults, 1 in adolescents, 1 in school-aged children, and 1 in preschoolers. One of the AD trials, LIBERTY AD CHRONOS, extends 52 weeks. The remaining eight trials of patients with asthma, CRSwNP, EoE, PN, and CSU lasted 24-52 weeks.
In the non-AD trials, the researchers observed that conjunctivitis rates were generally in the 1%-3% range, with less pronounced or no differences between the dupilumab and placebo groups. In the AD trials, conjunctivitis rates were higher in patients receiving dupilumab, compared with those receiving placebo across age groups.
In the 16-week SOLO 1 & 2 and AD-1021 monotherapy trials, 12 conjunctivitis events occurred in 517 patients who received placebo (2%), compared with 103 of 1047 patients (9.84%) who received dupilumab. Of the dupilumab-associated conjunctivitis cases, 80 (78%) patients recovered by the end of the trials. Of the 23 cases of conjunctivitis that did not recover or dropped out of the trial, 15 were among the 529 patients who received 300 mg dupilumab once every 2 weeks (q2w) (3%) and eight were among the 518 who received 300 mg dupilumab once weekly (qw) (2%).
In the 52-week LIBERTY AD CHRONOS trial, 29 conjunctivitis events occurred in 315 patients who received placebo plus topical corticosteroid (TCS) (9%), compared with 113 of 425 patients (27%) who received dupilumab plus TCS. Of these, 103 (91%) recovered by the end of the trial. Of the 11 patients with conjunctivitis who did not recover or dropped out of the trial, 3 were among the 110 patients who received 300 mg dupilumab q2w plus TCS (3%), and 8 were among the 315 who received 300 mg dupilumab qw plus TCS (3%).
"When I look at all of this data, I think that about 2% of people treated with dupilumab are going to get clinically very meaningful conjunctivitis that may be therapy limiting," Dr. Zirwas concluded. "The vast majority of those cases appear to happen in the first 16 weeks. This is just not something we see in cases of patients treated with dupilumab treated for other reasons."
Following his presentation, a meeting attendee asked Dr. Zirwas if conjunctivitis occurs more often in patients with facial dermatitis. "My perception is that it happens more often in people who have facial or eyelid dermatitis, but I've seen it in plenty of people who didn't have any facial or eyelid dermatitis," he said. "I have seen more conjunctivitis in people with more severe AD and more severe atopic comorbidities. That is anecdotal. The data that I have seen has been back and forth on this topic."
Dr. Zirwas disclosed that he is a speaker and consultant for Sanofi, Regeneron, Leo, Lilly, Galderma, Pfizer, and AbbVie. Several of his co-authors work for Regeneron Pharmaceuticals.
This article originally appeared on MDedge.com, part of the Medscape Professional Network.
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