Final answer:
Bupivacaine HCI, also known as Marcaine, is a local anesthetic used to numb and relieve pain. It works by blocking nerve signals and is commonly administered through injection.
Step-by-step explanation:
Bupivacaine HCI, also known by the brand name Marcaine, is a local anesthetic that is commonly used in medical procedures and surgeries. It works by blocking nerve signals in a specific area of the body, resulting in temporary numbness and pain relief. Bupivacaine HCI is typically administered through injection and is used in various medical settings, such as hospitals, dental offices, and outpatient clinics.