On June 13, the FDA approved baricitinib, a Janus kinase inhibitor (Olumiant, Lilly), for severe AA, and two other options may not be far behind. Pfizer and Concert Pharmaceuticals have JAK inhibitors in late-stage development for AA. JAK inhibitors, including baricitinib, are already on the market for treating rheumatoid arthritis and other autoimmune diseases.
Meanwhile, dermatologists have been fielding calls from hopeful patients and sorting out who should get the treatment, how to advise patients on risks and benefits, and what tests should be used before and after starting treatment.
Dr. Adam Friedman
Uptake for new systemic drugs, such as biologics, can be slow in dermatology, noted Adam Friedman, MD, professor and chair of dermatology, George Washington University, Washington, as some doctors like to stick with what they know.
He told this news organization that he hopes that uptake for baricitinib is quicker, as it is the only approved oral systemic treatment for patients with severe alopecia areata, which affects about 300,000 people a year in the United States. Other treatments, including steroid injections in the scalp, have lacked efficacy and convenience.
Beyond the physical effects, the mental toll of patchy hair clumps and missing brows and lashes can be devastating for patients with alopecia areata.
Fielding patient inquiries
Word of the FDA approval spread fast, and calls and emails are coming into dermatologists’ offices and clinics from interested patients.
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Physicians should be ready for patients with any kind of hair loss, not just severe alopecia areata, to ask about the drug, Dr. Friedman said. Some patients contacting him don’t fit the indication, which “highlights how disabling hair loss” is for people, considering that, in general, “people see this and think it is for them.”
Baricitinib is not a new drug, but a drug with a new indication. It had already been approved for treating moderate to severe RA in patients who have had an inadequate response to one or more tumor necrosis factor blockers, and for treating COVID-19 in certain hospitalized adults.
Boxed warning
Patients may ask about the boxed warning in the baricitinib label about the increased risk for serious infections, mortality, malignancy, major adverse cardiovascular events, and thrombosis.
Natasha A. Mesinkovska, MD, PhD, an investigator in the clinical trials that led to FDA approval of baricitinib and the chief scientific officer at the National Alopecia Areata Foundation, told this news organization that several aspects of the label are important to point out.
One is that the warning is for all the JAK inhibitors used to treat RA and other inflammatory conditions, not just baricitinib. Also, the warning is based mostly on data on patients with RA who, she noted, have substantial comorbidities and have been taking toxic immunosuppressive medications. The RA population is also typically many years older than the alopecia areata population.
“Whether the warnings apply to the alopecia areata patients is as yet unclear,” said Dr. Mesinkovska, who is also an associate professor of dermatology at the University of California, Irvine.
Patients are also asking about how well it works.
In one of the two trials that led up to the FDA approval, which enrolled patients with at least 50% scalp hair loss for over 6 months, 22% of the patients who received 2 mg of baricitinib and 35% of those who received 4 mg saw adequate hair coverage (at least 80%) at week 36, compared with 5% on placebo. In the second trial, 17% of those who received 2 mg and 32% who received 4 mg saw adequate hair coverage, compared with 3% on placebo.
Common side effects associated with baricitinib, according to the FDA, are lower respiratory tract infections, headache, acne, high cholesterol, increased creatinine phosphokinase, urinary tract infection, liver enzyme elevations, folliculitis, fatigue, nausea, genital yeast infections, anemia, neutropenia, abdominal pain, herpes zoster (shingles), and weight gain.
The risk-benefit discussions with patients should also include potential benefits beyond hair regrowth on the scalp. Loss of hair in the ears and nose can affect hearing and allergies, Dr. Mesinkovska said.
“About 30%-50% with alopecia areata, depending on age group or part of the world, will have allergies,” she said.
Patients should also know that baricitinib will need to be taken “for a very long time,” Dr. Mesinkovska noted. It’s possible that could be forever and that stopping the medication at any point may result in hair falling out again, she says, but duration will vary from case to case.
The good news is that it has been well tolerated. “We give a lot of medications for acne like doxycycline and other antibiotics and people have more stomach problems and angst with those than with [baricitinib],” she said.