Marcaine (Bupivacaine Hydrochloride) 0.75% Injection 10 mL Vials, 10/pack (Rx)Marcaine (Bupivacaine Hydrochloride) 0. 75% Injection is a local anesthetic used to provide long lasting pain relief during surgical, dental, and obstetric procedures. It works by blocking nerve signals in specific areas of the body, preventing the sensation of pain. Marcaine is particularly effective for regional anesthesia techniques such as epidurals, nerve blocks, and spinal anesthesia, making it ideal for managing pain in complex procedures,