The drug, marketed as, is currently approved in the United States to treat , , , , and in adults. is also approved to treat in patients aged 12 years and older and and in some patients as young as age 6 months.
As the roster of approved and off-label indications grows, skin specialists said, pediatricians and other primary care providers should become familiar with the drug – given the increasing likelihood that their patients may be taking the medication.
The U.S. Food and Drug Administration first approved dupilumab in 2017 for eczema and has continued to add new treatment indications, the
A well-tolerated – if expensive – drug
Dupilumab, an interleukin-4 (IL-4) receptor alpha-antagonist biologic, blocks both IL-4 and IL-13 signaling,, associate professor of dermatology at the University of California, San Francisco, told this news organization.
Dr. Fassett said she prescribes the drug off label for chronic idiopathic, including in older patients, and finds that the side effects in older patients are similar to those in younger people. The $36,000 per year, although some patients can get it more cheaply.
“Dupixent is a super-safe drug because it doesn’t immunosuppress any other part of the immune system, so you still have good antibacterial, antiviral, and antifungal immunity,” she added. “That makes perfect sense as a biological mechanism, and it’s been found safe in clinical trials.”
Case reports of potential adverse reactions to dupilumab have included, lichen planus, and .
“We’re still learning about complications and are watching patients carefully,” said, section chief of dermatology at Children’s Hospital of Philadelphia.
Many people with atopic dermatitis also have other allergic conditions, such as, asthma, prurigo nodularis, , and seasonal . Each of these conditions has a pathway that depends on IL-4 receptors, Dr. Fassett said.
“It’s amazing how many conditions Dupixent improves. Sometimes we prescribe on-label Dupixent for atopic dermatitis, and inadvertently, the drug also improves that patient’s other, off-label conditions,” Dr. Fassett said. “I think that’s the best evidence that Dupixent works in these off-label cases.”
Lindsay C. Strowd, MD, associate professor of dermatology at Wake Forest University, Winston-Salem, N.C., said she uses off-label dupilumab to treatand intense of unknown etiology.
“And several times I have treated drug reaction with eosinophilia and systemic symptoms, a rare adverse drug reaction that causes a rash and eosinophilia,” Dr. Strowd added.
, professor of medicine and clinical service chief at the University of California, San Diego, mainly treats elderly patients. She uses dupilumab to treat bullous pemphigoid and chronic pruritus. “There have been reports of using Dupixent to treat adult , , localized , and even ,” she told this news organization.
As a pediatric dermatologist, Dr. Perman treats children with atopic dermatitis as young as 3 months of age. She also uses dupilumab for alopecia areata,, and pruritus not otherwise specified.
and facial redness are two side effects Dr. Fassett sometimes sees with dupilumab. They occur similarly with all conditions and in all age groups. “We don’t know why they occur, and we don’t always know how to alleviate them,” she said. “So a small number of patients stop using Dupixent because they can’t tolerate those two side effects.
“We’re not worried about infection risk,” Dr. Fassett said. “Your patients may have heard of dupilumab as an immunosuppressant, but itsis very focused. You can reassure them that they’re not at increased risk for viral or bacterial infections when they’re on this drug.”
“I don’t think there are any different safety signals to watch for with on-label vs. off-label Dupixent use,” Dr. Strowd added. “In general, the medicine is very safe.”
Dr. Hata said she is impressed with dupilumab’s safety in her elderly patients. All her patients older than 85 years who have taken the drug for bullous pemphigoid have tolerated it well, she said.
“Dupixent seems to be a safe alternative for elderly patients with pruritus because they often cannot tolerate sedating antihistamines due to the risk of falling,” Dr. Hata said. “And UV therapy may be difficult for elderly patients due to problems with transport.”
Although some of Dr. Hata’s elderly patients with atopic dermatitis have discontinued use of the drug after developing conjunctivitis, none taking the drug off label have discontinued it because of side effects, she noted.
“Dupixent manages the condition, but it is not a cure,” Dr. Fassett noted. “Based on the current data, we think it’s safe and effective to take long term, potentially for life.”