Find patient medical information for Codeine on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings NHS information about the medicine codeine, including what it's used for, who can take it, how to take it and side effects. Easy-to-read patient tips for codeine covering how it works, benefits, risks, and best practices. View codeine phosphate information, including dose, uses, side-effects, renal impairment, pregnancy, breast feeding, contra-indications and important safety information. Codeine can cause serious unwanted effects if taken by adults, children, or pets who are not used to strong narcotic pain medicines. Make sure you store the medicine in a safe and secure place to prevent others from getting it. Drop off any unused narcotic medicine at a drug take-back location right away. Codeine is used to manage mild to moderate pain, where treatment with an opioid is appropriate, and when other pain treatments such as non-opioid pain medicines do not treat your pain well enough or you cannot tolerate them. It is available as codeine sulfate tablets. Includes codeine side effects, interactions, and indications. Codeine is used to relieve pain. It is also used to relieve cough. Codeine belongs to a class of medications called opiate (narcotic) analgesics and to a class of medications called antitussives. When codeine is used to treat pain, it works by changing the way the brain and nervous system respond to pain. When codeine is used to reduce coughing, it works by decreasing the activity in the part. La codéine est un alcaloïde morphinique, présent sous forme de base dans l' opium. Néanmoins, elle est utilisée en thérapeutique majoritairement sous forme de sels (phosphate notamment). Elle est extrêmement proche de la morphine, dont elle ne diffère que par un groupement méthyle en position 3. On peut d'ailleurs effectuer la synthèse de la morphine à partir de codéine par. Codeine is used to treat mild to moderate pain. [7] It is commonly used to treat post-surgical dental pain. [15] Weak evidence indicates that it is useful in cancer pain, but it may have increased adverse effects, especially constipation, compared to other opioids. [16] The American Academy of Pediatrics does not recommend its use in children due to side effects. [11] The Food and Drug. Codeine is a narcotic pain reliever (analgesic) used to treat mild to moderately severe pain frequently combined with Tylenol or aspirin. Common side effects include itching, rash, stomach pain, constipation, shortness of breath, nausea, lightheadedness, and dizziness. Codeine is a controlled narcotic and it has the potential for abuse. Dependence and addiction can occur with codeine, even at.