Lortab is a prescription medication that is classified as an opioid analgesic. Its primary function is to treat moderate to severe pain. Lortab works by attaching to opioid receptors in the brain and spinal cord, which alters pain perception and inhibits pain signal transmission. Lortab can be used to treat short-term pain after surgery, accident, or medical treatments. Lortab can also be used to treat chronic pain disorders such osteoarthritis, rheumatoid arthritis, fibromyalgia, and neuropathic pain. When other pain drugs are ineffective, Lortab can be used as part of a multimodal approach to managing cancer-related pain.