"Consumers and health care professionals will soon find updated labeling for extended-release and long-acting opioid pain relievers to help ensure their safe and appropriate use.
In addition to requiring new labeling on these prescript"...
Codeine phosphate is a centrally active analgesic. When administered parenterally, 120 mg of codeine phosphate produces an analgesic response equivalent to that from 10 mg of morphine. Other actions include respiratory depression; depression of the cough center; release of antidiuretic hormone; activation of the vomiting center; pupillary constriction; a decrease in gastric, pancreatic, and biliary secretion; a reduction in intestinal motility; an increase in biliary tract pressure; and an increased amplitude of ureteral contractions.
Most of a dose of codeine is excreted within 24 hours, 5% to 15% as unchanged codeine and the remainder as a product of glucuronide conjugates of codeine and its metabolites.
Last reviewed on RxList: 12/8/2004
This monograph has been modified to include the generic and brand name in many instances.
Additional Codeine Phosphate Information
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