JAK Inhibitors for Alopecia

What are oral JAK inhibitors?

JAK inhibitors are targeted medications that have changed the treatment landscape for alopecia areata, an autoimmune form of hair loss. In alopecia areata, the immune system attacks the hair follicle. JAK inhibitors help interrupt signaling involved in that immune process.

These medications are generally considered when hair loss is more extensive or when limited local treatment is unlikely to be enough. Other JAK inhibitors are also used to treat atopic dermatitis.

Which JAK inhibitors are used for alopecia areata?

Current oral JAK inhibitor options used in dermatology for alopecia areata include:

• Baricitinib (Olumiant)

  Ritlecitinib (Litfulo)

• Deuruxolitinib (Leqselvi)

Although these medications all affect JAK-related pathways, they are not identical. They differ in the details of how they work, who they may be appropriate for, and the pretreatment review they require.

What are possible side effects of oral JAK inhibitors?

Possible side effects and risks can include:

• Infections

• Acne or headache

• Cholesterol or other lab changes

• Nausea in some patients

• Blood clots, cardiovascular warnings, or other serious adverse effects in selected patients

These medications require individualized risk-benefit discussion. That does not mean they should not be used, but it does mean treatment should be selected thoughtfully.

How are oral JAK inhibitors used?

These medications are taken by mouth on a schedule directed by your provider. Before treatment, your dermatologist may review your medical history, medications, lab work, and other pretreatment considerations.

Hair regrowth is often gradual, and response can vary. As with many hair-loss treatments, patience and consistent follow-up are important.