Codeine Phosphate and Chlorpheniramine Maleate (Tuxarin ER)
For more on this Drug Safety Labeling Change, click here.
For full prescribing information, click here.
Updated Boxed Warning
WARNING: ADDICTION, ABUSE, AND MISUSE; LIFE-THREATENING RESPIRATORY DEPRESSION; ACCIDENTAL INGESTION; ULTRA-RAPID METABOLISM OF CODEINE AND OTHER RISK FACTORS FOR LIFE-THREATENING RESPIRATORY DEPRESSION IN CHILDREN; MEDICATION ERRORS; INTERACTIONS WITH DRUGS AFFECTING CYTOCHROME P450 ISOENZYMES; CONCOMITANT USE WITH BENZODIAZEPINES OR OTHER CNS DEPRESSANTS; NEONATAL OPIOID WITHDRAWAL SYNDROME
Addiction, Abuse, and Misuse
TUXARIN ER exposes patients and other users to the risks of opioid addiction, abuse, and misuse, which can lead to overdose and death. Reserve TUXARIN ER for use in adult patients for whom the benefits of cough suppression are expected to outweigh the risks, and in whom an adequate assessment of the etiology of the cough has been made. Assess each patient's risk prior to prescribing TUXARIN ER, prescribe TUXARIN ER for the shortest duration that is consistent with individual patient treatment goals, monitor all patients regularly for the development of addition or abuse, and refill only after reevaluation of the need for continued treatment. [see Warnings and Precautions (5.1)]
Life-Threatening Respiratory Depression
Serious, life-threatening, or fatal respiratory depression may occur with use of TUXARIN ER. Monitor for respiratory depression, especially during initiation of TUXARIN ER therapy or when used in patients at higher risk [see Warnings and Precautions (5.2)].
Accidental Ingestion
Accidental ingestion of even one dose of TUXARIN ER, especially by children, can result in a fatal overdose of codeine [see Warnings and Precautions (5.2)].
Ultra-Rapid Metabolism of Codeine and Other Risk Factors for Life-Threatening Respiratory Depression in Children
Life threatening respiratory depression and death have occurred in children who received codeine. Most of the reported cases occurred following tonsillectomy and/or adenoidectomy, and many of the children had evidence of being an ultra-rapid metabolizer of codeine due to a CYP2D6 polymorphism. [see Warnings and Precautions (5.3)]. TUXARIN ER is contraindicated in children younger than 12 years of age and in children younger than 18 years of age following tonsillectomy and/or adenoidectomy [see Contraindications (4)]. Avoid the use of TUXARIN ER in adolescents 12 to 18 years of age who have other risk factors that may increase their sensitivity to the respiratory depressant effects of codeine. [see Warnings and Precautions (5.1)].
Interactions with Drugs Affecting Cytochrome P450 Isoenzymes
The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with codeine are complex, requiring careful consideration of the effects on the parent drug, codeine, and the active metabolite, morphine. Avoid the use of TUXARIN ER in patients who are taking a CYP3A4 inhibitor, CYP3A4 inducer, or 2D6 inhibitor [see Warnings and Precautions (5.8), Drug Interactions (7.1, 7.2, 7.4)].
Risks from Concomitant Use with Benzodiazepines, CNS Depressants
Concomitant use of opioids with benzodiazepines or other central nervous system (CNS) depressants, including alcohol, may result in profound sedation, respiratory depression, coma, and death. Avoid use of TUXARIN ER in patients taking benzodiazepines, other CNS depressants, or alcohol. [see Warning and Precautions (5.9) Drug Interactions (7.5)].
Neonatal Opioid Withdrawal Syndrome
TUXARIN ER is not recommended for use in pregnant women [see Use in Specific Populations (8.1)]. Prolonged use of TUXARIN ER during pregnancy can result in neonatal opioid withdrawal syndrome, which may be life-threatening if not recognized and treated, and requires management according to protocols developed by neonatology experts. If TUXARIN ER is used for a prolonged period in a pregnant woman, advise the patient of the risk of neonatal opioid withdrawal syndrome and ensure that appropriate treatment will be available [see Warnings and Precautions (5.15)].
Public Information from the FDA and Medscape
Information provided by FDA and/or its employees on this website is for educational purposes only, and does not constitute medical advice. Any statement or advice given by an FDA employee on this website does not represent the formal position of FDA. FDA and/or any FDA employee will not be liable for injury or other damages resulting to any individuals who view FDA-related materials on this website.
Cite this: Drug Safety Warnings and Updates: April-June 2018 - Medscape - Sep 10, 2018.
