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Drug Interactions between Entereg and Hydrostat IR

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

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Interactions between your drugs

Major

HYDROmorphone alvimopan

Applies to: Hydrostat IR (hydromorphone) and Entereg (alvimopan)

CONTRAINDICATED: Recent exposure to opioids can increase the sensitivity to mu opioid receptor antagonists.

MANAGEMENT: The use of alvimopan is contraindicated in patients who have received therapeutic doses of opioids for more than 7 consecutive days immediately prior to alvimopan administration. Caution is advised in patients who have received more than 3 doses of an opioid within the week prior to surgery, as these patients were not studied in the postoperative ileus clinical trials. Patients with recent exposure to opioids should be monitored for increased adverse effects such as abdominal pain, nausea and vomiting, and diarrhea.

References

  1. "Product Information. Entereg (alvimopan)." GlaxoSmithKline (2008):

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Drug and food interactions

Major

HYDROmorphone food

Applies to: Hydrostat IR (hydromorphone)

GENERALLY AVOID: Alcohol may potentiate the central nervous system (CNS) depressant effects of opioid analgesics including hydromorphone. Concomitant use may result in additive CNS depression and impairment of judgment, thinking, and psychomotor skills. In more severe cases, hypotension, respiratory depression, profound sedation, coma, or even death may occur.

GENERALLY AVOID: Consumption of alcohol while taking sustained-release formulations of hydromorphone may cause rapid release of the drug, resulting in high systemic levels of hydromorphone that may be potentially lethal even in opioid-tolerant patients. Alcohol appears to disrupt the extended release mechanism, causing 'dose-dumping' into the bloodstream. In 48 healthy volunteers, coadministration of a 12 mg dose of sustained-release hydromorphone with 240 mL of 40% (80 proof) alcohol resulted in a mean peak hydromorphone concentration (Cmax) approximately six times greater than when taken with water. One subject had a 16-fold increase in hydromorphone Cmax with 40% alcohol compared to water. In some subjects, coadministration with 8 ounces of 4% alcohol (equivalent to 2/3 of a typical serving of beer) resulted in almost twice the hydromorphone Cmax than when coadministered with water. The effect of alcohol was more pronounced in a fasted state.

MANAGEMENT: Patients taking sustained-release formulations of hydromorphone should not consume alcohol or use medications that contain alcohol on days of hydromorphone dosing. In general, potent narcotics such as hydromorphone should not be combined with alcohol.

References

  1. Levine B, Saady J, Fierro M, Valentour J "A hydromorphone and ethanol fatality." J Forensic Sci 29 (1984): 655-9
  2. "Product Information. Dilaudid (hydromorphone)." Knoll Pharmaceutical Company PROD (2001):
  3. FDA. U.S. Food and Drug Administration "Healthcare Professional Sheet. FDA Alert [07/2005]: alcohol-palladone interaction. http://www.fda.gov/medwatch/SAFETY/2005/safety05.htm#Palladone" (2005):

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Minor

alvimopan food

Applies to: Entereg (alvimopan)

Coadministration with a high-fat meal may decrease the rate and extent of alvimopan absorption. According to the product labeling, alvimopan peak plasma concentration (Cmax) and systemic exposure (AUC) were decreased by approximately 38% and 21%, respectively, and the time to reach peak plasma concentration (Tmax) was prolonged by approximately 1 hour when taken with a high-fat meal. The clinical significance is unknown. In postoperative ileus clinical trials, the preoperative dose of alvimopan was administered in a fasting state, and subsequent doses were given without regard to meals.

References

  1. "Product Information. Entereg (alvimopan)." GlaxoSmithKline (2008):

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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.

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