FDA Approves Ustekinumab-stba for All Forms & Dosages as Its Reference Product Michele B. Kaufman, PharmD, BCGP | July 16, 2025Ustekinumab-stba (Steqeyma) now has FDA approval for all forms and dosages of its reference product, ustekinumab (Stelara), including a subcutaneous injection to treat pediatric patients with plaque psoriasis or psoriatic arthritis.