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Drug Interactions between troglitazone and Votrient

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

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Interactions between your drugs

Moderate

troglitazone PAZOPanib

Applies to: troglitazone and Votrient (pazopanib)

GENERALLY AVOID: Coadministration with inducers of CYP450 3A4 may decrease the plasma concentrations and pharmacologic effects of pazopanib, which is primarily metabolized by the isoenzyme.

MANAGEMENT: The use of pazopanib in combination with potent CYP450 3A4 inducers such as carbamazepine, dexamethasone, enzalutamide, phenobarbital, phenytoin, rifamycins, and St. John's wort should generally be avoided. Alternative treatment lacking CYP450 3A4-inducing activity should be considered in patients receiving pazopanib; otherwise, pazopanib should not be used. Other known CYP450 3A4 inducers include aminoglutethimide, barbiturates, bexarotene, bosentan, dabrafenib, efavirenz, nafcillin, nevirapine, somatrem, somatropin, and various other anticonvulsants, although the extent to which they may interact with pazopanib is unknown.

References

  1. (2009) "Product Information. Votrient (pazopanib)." GlaxoSmithKline

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Drug and food interactions

Major

PAZOPanib food

Applies to: Votrient (pazopanib)

GENERALLY AVOID: Grapefruit juice may increase the plasma concentrations of pazopanib. The proposed mechanism is inhibition of CYP450 3A4-mediated first-pass metabolism in the gut wall by certain compounds present in grapefruits. Although not studied, the interaction may increase the risk of QT interval prolongation and torsade de pointes arrhythmia as well as severe and fatal hepatotoxicity associated with the use of pazopanib.

ADJUST DOSING INTERVAL: Food increases the oral bioavailability of pazopanib. The mechanism of interaction is unknown. Administration of pazopanib with a high-fat or low-fat meal results in an approximately 2-fold increase in peak plasma concentration (Cmax) and systemic exposure (AUC).

MANAGEMENT: Patients treated with pazopanib should avoid consumption of grapefruit, grapefruit juice, and any supplement containing grapefruit extract. Pazopanib should be administered at least one hour before or two hours after a meal.

References

  1. (2009) "Product Information. Votrient (pazopanib)." GlaxoSmithKline

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Moderate

troglitazone food

Applies to: troglitazone

GENERALLY AVOID: Alcohol may cause hypoglycemia or hyperglycemia in patients with diabetes. Hypoglycemia most frequently occurs during acute consumption of alcohol. Even modest amounts can lower blood sugar significantly, especially when the alcohol is ingested on an empty stomach or following exercise. The mechanism involves inhibition of both gluconeogenesis as well as the counter-regulatory response to hypoglycemia. Episodes of hypoglycemia may last for 8 to 12 hours after ethanol ingestion. By contrast, chronic alcohol abuse can cause impaired glucose tolerance and hyperglycemia. Moderate alcohol consumption generally does not affect blood glucose levels in patients with well controlled diabetes. A disulfiram-like reaction (e.g., flushing, headache, and nausea) to alcohol has been reported frequently with the use of chlorpropamide and very rarely with other sulfonylureas.

MANAGEMENT: Patients with diabetes should avoid consuming alcohol if their blood glucose is not well controlled, or if they have hypertriglyceridemia, neuropathy, or pancreatitis. Patients with well controlled diabetes should limit their alcohol intake to one drink daily for women and two drinks daily for men (1 drink = 5 oz wine, 12 oz beer, or 1.5 oz distilled spirits) in conjunction with their normal meal plan. Alcohol should not be consumed on an empty stomach or following exercise.

References

  1. Jerntorp P, Almer LO (1981) "Chlorpropamide-alcohol flushing in relation to macroangiopathy and peripheral neuropathy in non-insulin dependent diabetes." Acta Med Scand, 656, p. 33-6
  2. Jerntorp P, Almer LO, Holin H, et al. (1983) "Plasma chlorpropamide: a critical factor in chlorpropamide-alcohol flush." Eur J Clin Pharmacol, 24, p. 237-42
  3. Barnett AH, Spiliopoulos AJ, Pyke DA, et al. (1983) "Metabolic studies in chlorpropamide-alcohol flush positive and negative type 2 (non-insulin dependent) diabetic patients with and without retinopathy." Diabetologia, 24, p. 213-5
  4. Hartling SG, Faber OK, Wegmann ML, Wahlin-Boll E, Melander A (1987) "Interaction of ethanol and glipizide in humans." Diabetes Care, 10, p. 683-6
  5. (2002) "Product Information. Diabinese (chlorpropamide)." Pfizer U.S. Pharmaceuticals
  6. (2002) "Product Information. Glucotrol (glipizide)." Pfizer U.S. Pharmaceuticals
  7. "Product Information. Diabeta (glyburide)." Hoechst Marion-Roussel Inc, Kansas City, MO.
  8. Skillman TG, Feldman JM (1981) "The pharmacology of sulfonylureas." Am J Med, 70, p. 361-72
  9. (2002) "Position Statement: evidence-based nutrition principles and recommendations for the treatment and prevention of diabetes related complications. American Diabetes Association." Diabetes Care, 25(Suppl 1), S50-S60
  10. Cerner Multum, Inc. "UK Summary of Product Characteristics."
View all 10 references

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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

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