Buy Hydrocodone 10-660 mg online typically refers to a combination medication containing hydrocodone and acetaminophen. The "10" indicates the amount of hydrocodone (10 mg), while "660" usually refers to the amount of acetaminophen (usually 660 mg).An opioid pain reliever used to treat moderate to severe pain. It works by altering the way the brain and nervous system respond to pain.A non-opioid pain reliever and fever reducer that enhances the effects of hydrocodone. This combination is often prescribed for pain management following surgery, injury, or for chronic pain conditions.