Rituximab for Sjögren’s Dry Mouth: Four TRACTISS Checks

If rituximab has come up at a Sjögren’s appointment, ask which problem the specialist wants to treat. Bring a record of mouth symptoms, current medicines and dental concerns, then work through these four checks before discussing an infusion plan.

Who was studied?

TRACTISS randomized 133 adults with primary Sjögren’s, fatigue and dry mouth. Eligibility required anti-Ro antibodies and remaining saliva; most had low systemic activity. The protocol involved four infusions and 48-week follow-up.¹

The primary symptom outcome

Success: at least 30% reduction in either fatigue or oral dryness. After imputing 16 participants’ missing data, response rates were 39.8% with rituximab versus 36.8% with placebo: adjusted odds ratio 1.13 (95% CI 0.50–2.55). Neither benefit nor equivalence was established.¹

Saliva-flow limits

Later unstimulated saliva-flow comparisons favored rituximab without multiplicity adjustment; the overall time interaction was not significant (P=.066). This did not establish symptom relief. Arthritis Research UK funded the trial; Roche supplied rituximab.¹

The BSR guideline does not recommend biologic drugs routinely outside treatment of specific systemic complications. A decision about an affected organ is different from prescribing mainly for mouth dryness. Ask your rheumatologist to name the intended benefit and how it will be assessed; this symptom trial is not a reason to stop treatment for another indication.²

Prescribing precautions

US intravenous Rituxan labeling does not include Sjögren’s; that use is off-label. Its boxed warning covers potentially fatal infusion reactions, severe mucocutaneous reactions, hepatitis B reactivation and progressive multifocal leukoencephalopathy (PML), a serious brain infection. Infusions require professional supervision with medical support. Hepatitis B screening, infection assessment and vaccination planning belong before treatment. Discuss pregnancy, contraception and breastfeeding with the prescribing team.³

For mouth care, NIDCR describes saliva substitutes and prescription saliva stimulants, alongside dental protection. Ask your dentist whether you need additional fluoride, such as a rinse, night gel or varnish. Dry mouth increases cavity and infection risk, so keep dental follow-up on the plan while rheumatology decisions are being made.⁴

Is It My Breath? includes “Supporting Saliva,” which separates comfort measures, prescription discussions and questions about fluoride. Use its Breath Log to record one change at a time, so you can tell the dentist which measures you have tried and what happened.