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Drug Interactions between retifanlimab and Troxyca ER

This report displays the potential drug interactions for the following 2 drugs:

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Interactions between your drugs

Major

oxyCODONE naltrexone

Applies to: Troxyca ER (naltrexone / oxycodone) and Troxyca ER (naltrexone / oxycodone)

Using naltrexone together with oxyCODONE is not recommended. Naltrexone can block the effects of oxyCODONE and make the medication less effective in treating your condition. If you have been receiving oxyCODONE for a while (for example, a week or longer), naltrexone can also precipitate withdrawal symptoms. Talk to your doctor if you have any questions or concerns. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Moderate

oxyCODONE retifanlimab

Applies to: Troxyca ER (naltrexone / oxycodone) and retifanlimab

Consumer information for this interaction is not currently available.

MONITOR: Opioid analgesics may reduce the efficacy of immune checkpoint inhibitors (ICIs) such as anti-cytotoxic T-lymphocyte-associated protein (CTLA)-4 monoclonal antibodies and/or inhibitors of programmed cell death-1 (PD-1)/programmed death ligand-1 (PD-L1). The mechanism of this interaction has not been fully elucidated, but may involve the ability of opioids to modify cellular functions of the immune system (T-cells), potentially affecting tumor growth. Additionally, ICIs can suppress the efficacy of opioids leading to an increase in opioid use via inhibition of the PD-1/PD-L1 signaling pathway. In a meta-analysis review of 7 studies (531 studies screened), it was observed that the use of opioids in patients treated with ICIs was negatively associated with overall survival (OS) and significantly reduced progression-free survival (PFS). Similarly, an observational, retrospective study including 375 patients with recurrent or metastatic cancer treated with anti-PD-1 or anti-PD-L1 monoclonal antibodies noted that patients who were not treated with opioid analgesics had significantly longer median PFS (6.83 vs. 4.30 months) and median OS (17.05 vs 7.68 months) compared to patients who were treated with opioid analgesics. Furthermore, a retrospective, single-center, observational cohort study observed that the median amount of change in opioid dose from baseline was significantly higher in patients who were treated with ICIs as compared to patients who were treated with non-ICI anticancer therapies (22.5 vs. 15.0 morphine mg equivalents). Multiple regression analysis and propensity score matching identified ICI administration as an independent factor associated with the amount of increase in opioid dose.

MANAGEMENT: Until more information is available, caution and clinical monitoring for reduced efficacy of immune checkpoint inhibitors (ICIs) and opioid analgesics are advised if concomitant therapy is required. Opioid analgesic use should be limited to clinically appropriate indications and durations. Clinicians should consult relevant literature, local and national treatment guidelines, and package labeling for further guidance.

Drug and food interactions

Major

oxyCODONE food

Applies to: Troxyca ER (naltrexone / oxycodone)

Do not use alcohol or medications that contain alcohol while you are receiving treatment with oxyCODONE. This may increase nervous system side effects such as drowsiness, dizziness, lightheadedness, difficulty concentrating, and impairment in thinking and judgment. In severe cases, low blood pressure, respiratory distress, fainting, coma, or even death may occur. You may also want to avoid or limit the consumption of grapefruit and grapefruit juice, which can significantly increase the blood levels of oxycodone in some people. Talk to your doctor or pharmacist if you have questions on how to take this or other medications you are prescribed. Do not use more than the recommended dose of oxyCODONE, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medication without first talking to your doctor.

Moderate

naltrexone food

Applies to: Troxyca ER (naltrexone / oxycodone)

Naltrexone may cause liver problems, and using it with other medications that can also affect the liver such as ethanol (alcohol) may increase that risk. You should avoid or limit the use of alcohol while being treated with these medications. Call your doctor immediately if you have fever, chills, joint pain or swelling, unusual bleeding or bruising, skin rash, itching, loss of appetite, fatigue, nausea, vomiting, abdominal pain, dark urine, pale stools, and/or yellowing of the skin or eyes, as these may be signs and symptoms of liver damage. Talk to your doctor or pharmacist if you have any questions or concerns. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Therapeutic duplication warnings

No warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.


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Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.