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Drug Interactions between Dilaudid and trihexyphenidyl

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

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Interactions between your drugs

Moderate

HYDROmorphone trihexyphenidyl

Applies to: Dilaudid (hydromorphone) and trihexyphenidyl

MONITOR: Central anticholinergic agents may have additive central nervous system (CNS) effects with cannabinoids, barbiturates, opiates, and alcohol. These agents individually can cause cognitive and psychomotor impairment, drowsiness, and dizziness, thus concomitant use may result in more potent effects. In addition, the potential for abuse may be increased when central anticholinergic agents are combined with these drugs.

MANAGEMENT: Patients taking central anticholinergic agents in combination with other CNS depressants should be monitored for potentially excessive or prolonged CNS depression, especially if they are elderly or debilitated. Ambulatory patients should be made aware of the possibility of additive CNS effects (e.g., drowsiness, dizziness, lightheadedness, confusion) and counseled to avoid activities requiring mental alertness until they know how these agents affect them. Patients should also be advised to notify their physician if they experience excessive or prolonged CNS effects that interfere with their normal activities.

References

  1. "Product Information. Artane (trihexyphenidyl)." Lederle Laboratories PROD (2001):

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Drug and food interactions

Major

HYDROmorphone food

Applies to: Dilaudid (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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Moderate

trihexyphenidyl food

Applies to: trihexyphenidyl

GENERALLY AVOID: Use of anticholinergic agents with alcohol may result in sufficient impairment of attention so as to render driving and operating machinery more hazardous. In addition, the potential for abuse may be increased with the combination. The mechanism of interaction is not established but may involve additive depressant effects on the central nervous system. No effect of oral propantheline or atropine on blood alcohol levels was observed in healthy volunteers when administered before ingestion of a standard ethanol load. However, one study found impairment of attention in subjects given atropine 0.5 mg or glycopyrrolate 1 mg in combination with alcohol.

MANAGEMENT: Alcohol should generally be avoided during therapy with anticholinergic agents. Patients should be counseled to avoid activities requiring mental alertness until they know how these agents affect them.

References

  1. Linnoila M "Drug effects on psychomotor skills related to driving: interaction of atropine, glycopyrrhonium and alcohol." Eur J Clin Pharmacol 6 (1973): 107-12

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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.

See also

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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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