Cosibelimab
Cosibelimab, sold under the brand name Unloxcyt, is a monoclonal antibody used for the treatment of cutaneous squamous-cell carcinoma.[1] The most common adverse reactions include fatigue, musculoskeletal pain, rash, diarrhea, hypothyroidism, constipation, nausea, headache, pruritis, edema, localized infection, and urinary tract infection.[1][2][3][4] Cosibelimab is indicated for the treatment of adults with metastatic cutaneous squamous-cell carcinoma or locally advanced cutaneous squamous-cell carcinoma who are not candidates for curative surgery or curative radiation.[1][2] Efficacy was evaluated in study CK-301-101 (NCT03212404), a multicenter, multicohort, open-label trial in 109 participants with metastatic cutaneous squamous-cell carcinoma or locally advanced cutaneous squamous-cell carcinoma who were not candidates for curative surgery or curative radiation.[2] Participants were excluded if they had any of the following: active or suspected autoimmune disease, allogeneic transplant within six months prior to treatment, prior treatment with anti-PD-1/PD-L1 blocking antibodies or other immune checkpoint inhibitor therapy, uncontrolled or significant cardiovascular disease, ECOG PS • 2, or infection with HIV, hepatitis B, or hepatitis C.[2] Cosibelimab was approved for medical use in the United States in December 2024.