Triamcinolone Acetonide 40 mg/mL Injection Multiple-Dose Vial 5 mL (RX)Triamcinolone Acetonide Injection 40 mg mL (5 mL Multi Dose Vial) Triamcinolone acetonide 40 mg mL injection is a potent synthetic glucocorticoid (corticosteroid) formulated as a sterile aqueous suspension. It comes in a 5 mL multiple use vial (commonly known by the brand name Kenalog 40) containing **40 mg of triamcinolone acetonide per mL. The multi dose formulation includes 0. 99% benzyl alcohol as a preservative (to allow multiple withdrawals)