Which of the following is a dosing form for Abatacept?

• A. SQ 125 mg weekly
• B. IV 250-500 mg every 3 weeks
• C. IV 500-1000 mg
• D. Oral tablet 100 mg daily

Answer: (C)

Abatacept is given in two forms: intravenous infusion and subcutaneous injection. There is no oral tablet form. The intravenous dosing is weight-based, usually given as 500 mg, 750 mg, or 1000 mg per infusion, with a typical schedule around the initial loading doses and then every 4 weeks. Seeing an IV dose range of 500–1000 mg per infusion aligns with how the IV form is administered, making this option the correct depiction of a dosing form for abatacept. The subcutaneous option (125 mg weekly) is also a real formulation, but the question here highlights the IV dosing range, and the oral tablet option does not exist for abatacept.