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Drug Interactions between Arthritis Foundation Pain Reliever and Pentoxil

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

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Interactions between your drugs

Moderate

aspirin pentoxifylline

Applies to: Arthritis Foundation Pain Reliever (aspirin) and Pentoxil (pentoxifylline)

MONITOR: The use of pentoxifylline has been associated with bleeding and/or prolongation in prothrombin time. Theoretically, the risk of bleeding may be increased by concomitant treatment with anticoagulants or other agents that affect hemostasis such as nonsteroidal anti-inflammatory drugs (NSAIDs), platelet inhibitors, thrombin inhibitors, thrombolytic agents, and dextran. There have been postmarketing reports of increased anticoagulant activity in patients receiving vitamin K antagonists in combination with pentoxifylline.

MANAGEMENT: Caution is advised if pentoxifylline is administered with anticoagulants or other agents that affect hemostasis. Patients on vitamin K antagonists such as warfarin should have more frequent monitoring of INR following initiation or dosage change of pentoxifylline, while patients receiving other agents that affect hemostasis should have periodic examinations for bleeding including hematocrit and/or hemoglobin.

References

  1. "Product Information. Trental (pentoxifylline)." Hoechst Marion Roussel PROD (2001):
  2. Canadian Pharmacists Association "e-CPS. http://www.pharmacists.ca/function/Subscriptions/ecps.cfm?link=eCPS_quikLink" (2006):

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Drug and food interactions

Moderate

aspirin food

Applies to: Arthritis Foundation Pain Reliever (aspirin)

GENERALLY AVOID: The concurrent use of aspirin or nonsteroidal anti-inflammatory drugs (NSAIDs) and ethanol may lead to gastrointestinal (GI) blood loss. The mechanism may be due to a combined local effect as well as inhibition of prostaglandins leading to decreased integrity of the GI lining.

MANAGEMENT: Patients should be counseled on this potential interaction and advised to refrain from alcohol consumption while taking aspirin or NSAIDs.

References

  1. "Product Information. Motrin (ibuprofen)." Pharmacia and Upjohn PROD (2002):

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Minor

aspirin food

Applies to: Arthritis Foundation Pain Reliever (aspirin)

One study has reported that coadministration of caffeine and aspirin lead to a 25% increase in the rate of appearance and 17% increase in maximum concentration of salicylate in the plasma. A significantly higher area under the plasma concentration time curve of salicylate was also reported when both drugs were administered together. The exact mechanism of this interaction has not been specified. Physicians and patients should be aware that coadministration of aspirin and caffeine may lead to higher salicylate levels faster.

References

  1. Yoovathaworn KC, Sriwatanakul K, Thithapandha A "Influence of caffeine on aspirin pharmacokinetics." Eur J Drug Metab Pharmacokinet 11 (1986): 71-6

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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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