Abstract
PURPOSE:Tocilizumab (TCZ) through intravenous infusion has been shown to effectively treat active thyroid eye disease (TED) refractory to systemic steroids. TCZ is also available as a self-administered subcutaneous injection, but data demonstrating the efficacy of this formulation are limited. This study investigated the efficacy and safety of subcutaneous TCZ (SC-TCZ) for the treatment of active, moderate-to-severe TED in smokers.MATERIALS AND METHODS:This retrospective clinical case series evaluated the clinical outcomes and adverse effects of SC-TCZ when taken for a minimum of 4 months by patients with moderate-to-severe TED and a current or recent history of cigarette smoking.RESULTS:Three patients received SC-TCZ every 1-2 weeks (4.6-11.2 mg/kg/month). The average pre-to-posttreatment clinical activity score reduction was 5.4, and proptosis was reduced by an average of 2.0 mm. No serious adverse effects were reported.CONCLUSION:SC-TCZ may be a useful and effective therapy for treating challenging cases of inflammatory TED and offers a safe alternative to office or hospital-based infusions. Further studies are needed to better understand optimal dosing regimens and relative efficacy compared to monthly TCZ infusions and other immunotherapies.
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