​Before discussing - “Why Buy Hydrocodone Online”. Know about why you are using Hydrocodone. Hydrocodone is an opioid or Narcotic drug that can combination of Hydrocodone and acetaminophen. These two ingredients work on your body differently first, Hydrocodone can help to relieve moderate to severe pain like back pain, Arthritis or joint pain, Fibromyalgia, Headaches, Neck pain, Neuropathic (nerve) pain, also helpful for cancer-related pain, cough.