Should I get the shingles vaccine before starting a JAK inhibitor?

A trial suggests finishing the vaccine first gives a stronger early antibody response, while starting the drug immediately relieves arthritis faster. It is a trade-off — discuss timing with your rheumatologist.

Why do JAK inhibitors matter for shingles?

JAK inhibitors are associated with an increased risk of shingles (herpes zoster), so vaccination timing is an important part of treatment planning.

Shingles Vaccine Timing With JAK Inhibitors in RA

JAK inhibitors raise shingles risk, so timing the vaccine matters. A randomized trial found a trade-off between a stronger vaccine response and faster arthritis relief.

JAK inhibitors are effective drugs for rheumatoid arthritis (RA) — but they carry a known downside: a higher risk of shingles. That makes a practical question surprisingly important: should patients get the shingles vaccine before starting the drug, or start treatment right away?

A new randomized trial, called STOP-HZ and published in Annals of Internal Medicine, put that question to the test across 12 sites in Japan.

The trade-off it found

The results point to a genuine trade-off rather than a clear winner:

Delaying the JAK inhibitor until after completing the recombinant zoster vaccine (RZV, the two-dose shingles shot) produced a stronger early antibody response to the vaccine.
Starting the JAK inhibitor immediately gave patients faster relief from their arthritis symptoms.
By 12 weeks, the antibody responses were similar between the two strategies.

What it means for patients

The takeaway isn't a rule but a judgment call: clinicians and patients should weigh how urgently the arthritis needs controlling against the desire for the strongest possible early vaccine protection. For someone with severe, active RA, faster symptom control may win; for someone at high shingles risk with milder disease, finishing the vaccine first may be preferable.

Important limits

This was a small, short, exploratory study — not powered to declare one approach best — and it didn't track actual shingles cases, only antibody responses. It's a useful signal to inform a conversation, not a definitive protocol. Anyone on or starting a JAK inhibitor should discuss vaccine timing with their rheumatologist. This article is general information, not medical advice.

This article is for general information only and is not medical advice. Consult a qualified healthcare professional for any medical decisions.

Shingles Vaccine First, Then a JAK Inhibitor? What a New RA Trial Suggests