Vicodin is a widely prescribed medication used globally to alleviate moderate to severe body pain and muscle spasms. Due to its classification as a Scheduled III Controlled Substance, Vicodin can only be purchased online or from authorized medical stores with a valid prescription. This medication combines Hydrocodone bitartrate and Acetaminophen drugs, which have been found to effectively block pain signals in the brain and reduce the sensation of pain. Hydrocodone is an opioid, while Acetaminophen acts as an analgesic, both present in specific proportions within Vicodin.