The Food and Drug Administration is restricting the use of two opiates – codeine and tramadol – in children, and also warns they are potentially dangerous to infants of breastfeeding women.
Codeine is approved to treat pain and cough; tramadol is approved to treat pain.
“We understand that there are limited options when it comes to treating pain or cough in children, and that these changes may raise some questions for health care providers and parents. However, please know that our decision today was made based on the latest evidence and with this goal in mind: keeping our kids safe,” Douglas Throckmorton, MD, the deputy center director for regulatory programs at the FDA Center for Drug Evaluation and Research, said in a statement.
In 2013, the FDA updated prescription codeine labeling to contain a boxed warning and contraindication for children up to age 18 years regarding the risk of slowed breathing from codeine prescribed after tonsillectomy and/or adenoidectomy. And in 2015, the agency issued warnings about the risk of serious breathing problems in children who had ultrarapid metabolism of codeine and tramadol.
In the current safety statement, the FDA said it will require additional labeling changes, including contraindications for use of codeine or tramadol in all children younger than 12 years of age and a new contraindication for tramadol in children younger than 18 years being treated for pain after tonsillectomy and/or adenoidectomy, warnings about their use in children 12-18 years of age with certain medical conditions, and a stronger warning recommending against their use in nursing mothers.
Single-ingredient codeine and all tramadol-containing products are FDA-approved only for use in adults, the agency noted.
The agency cited particular concerns over those who are “ultra-rapid metabolizers” of substrates of the cytochrome P450 isoenzyme 2D6 (CYP2D6) genotype. These people more quickly convert codeine into potentially dangerously high levels of morphine, which can lead to fatal respiratory depression.
Supporting the restrictions and warning were data on 64 cases of respiratory depression that occurred worldwide between 1969 and 2015, when a codeine-based medicine was used in children younger than 18 years. Twenty-four of these children died.
The most frequently cited medicines in the cases were acetaminophen with codeine and promethazine with codeine with or without phenylephrine, either given to soothe postoperative pain, general pain, sore or strep throat pain, or cough and cold.
Ten of the 64 cases implicated the CYP2D6 genotype. Seven of the patients were “ultrarapid metabolizers,” five of whom died.
Data cited on tramadol included nine worldwide cases of tramadol-related respiratory depression occurring between 1969 and 2016, resulting in the deaths of three children, all under the age of 6 years, and all of whom were taking the drug for postoperative pain or fever.
All but one case of respiratory depression occurred within the first 24 hours of taking the drug. One of the patients was genotyped for CYP2D6, and found to have three functional alleles consistent with ultrarapid metabolism.
Mothers who are ultrarapid metabolizers of codeine can have high levels of morphine in their breast milk that are dangerous to their breastfed infants, whereas there is less of a threat posed by women with normal codeine metabolism because the amount of codeine secreted into the breast milk is low and dose dependent.
The FDA stated that data reveal numerous reports of respiratory depression and at least one death in infants of breastfeeding mothers taking these medicines, particularly mothers with the CYP2D6 genotype. Although there are FDA-cleared tests for ultrarapid metabolism, they are not commonly used.
The agency stated that breastfeeding women taking any opioid pain medicine, including codeine or tramadol should contact their health care provider if they notice the infant is sleeping more than 4 hours at a time, or if the infant is having difficulty breastfeeding or seems limp.
Clinicians are urged to report side effects that occur while using codeine or tramadol to the FDA’s MedWatch Adverse Event Reporting program.
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