Vicodin is a combination of two main ingredients, Acetaminophen, and hydrocodone. Hydrocodone belongs to the opioid family of drugs that reduce pain. Sometimes an opioid called a narcotic. In the Vicodin, Acetaminophen is a low strength pain killer, which increases the strength of hydrocodone. You can buy Vicodin online with a proper prescription. Ask the authorities to provide a prescription accurately if you found your order without it.