Hydrocodone plus homatropine (Hycodan) in the form of small tablets for coughing and especially neuropathic moderate pain (the homatropine, an anticholinergic, is useful in both of those cases and is a deterrent to intentional overdose) was more widely used than Dicodid and was labelled as a cough medicine in the United States whilst Vicodin. Hydrocodone is a potent opioid used to manage severe and persistent pain that requires an extended treatment period with a daily opioid pain medicine, when other non-opioid pain medicines do not treat your pain well enough, or you cannot tolerate them. Hydrocodone affects more than just pain. Learn how it works in the brain, gut, lungs, and hormones — and what changes with long-term use. Find patient medical information for Hydrocodone (Hysingla ER, Zohydro ER) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Severe hydrocodone / acetaminophen side effects include liver damage, serious allergic reactions, and opioid overdose. These usually require immediate medical attention. Hydrocodone / acetaminophen is a controlled substance that can cause dependence and misuse. Taking this medication exactly as prescribed can help you manage these risks. Hydrocodone can cause serious unwanted effects or fatal overdose if taken by children, pets, or adults who are not used to strong opioid pain medicines. Make sure you store the medicine in a safe and secure place to prevent others from getting it. Drop off any unused opioid medicine at a drug take-back location right away. Hydrocodone—an opioid narcotic—is often prescribed for its pain-relieving effects; however, it can have dangerous effects when abused. Find patient medical information for Hydrocodone/Acetaminophen (Norco, Vicodin, others) on WebMD including its uses, side effects and safety, interactions, pictures. Hydrocodone commonly causes constipation, drowsiness, nausea, and dizziness. These are the side effects most people experience, and they tend to be strongest when you first start taking the medication or after a dose increase. Learn about the side effects of hydrocodone, from common to rare, for consumers and healthcare professionals.