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Drug Interactions between Accolate and stiripentol

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

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Interactions between your drugs

Moderate

zafirlukast stiripentol

Applies to: Accolate (zafirlukast) and stiripentol

MONITOR: Coadministration with inhibitors of CYP450 1A2, 2C19, and/or 3A4 may increase the plasma concentrations of stiripentol, which has been shown in vitro to undergo phase I metabolism via these pathways.

MANAGEMENT: Caution is advised when stiripentol is used with CYP450 1A2, 2C19, and/or 3A4 inhibitors. Patients should be monitored for potentially increased adverse effects such as anorexia, nausea, vomiting, weight loss, somnolence, dizziness, confusion, difficulty concentrating, ataxia, hypotonia, tremor, hyperkinesia, dysarthria, suicidal ideation/behaviour, neutropenia, and thrombocytopenia. Dosage adjustments for stiripentol or alternative treatments may be required if an interaction is suspected.

References

  1. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  2. EMEA. European Medicines Agency (2007) EPARs. European Union Public Assessment Reports. http://www.ema.europa.eu/ema/index.jsp?curl=pages/includes/medicines/medicines_landingpage.jsp&mid
  3. (2018) "Product Information. Diacomit (stiripentol)." Biocodex USA

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Drug and food interactions

Moderate

zafirlukast food

Applies to: Accolate (zafirlukast)

ADJUST DOSING INTERVAL: Food may reduce the oral absorption and bioavailability of zafirlukast. In two separate studies, one using a high-fat and the other a high-protein meal, administration of zafirlukast with food reduced the mean bioavailability by approximately 40%.

MANAGEMENT: To ensure maximal oral absorption, zafirlukast should be administered at least 1 hour before or 2 hours after meals.

References

  1. (2001) "Product Information. Accolate (zafirlukast)." Astra-Zeneca Pharmaceuticals

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Moderate

stiripentol food

Applies to: stiripentol

GENERALLY AVOID: Taking stiripentol on an empty stomach may reduce its oral bioavailability. Stiripentol degrades rapidly when exposed to gastric acid in an empty stomach.

GENERALLY AVOID: Alcohol may potentiate the depressant effects of stiripentol on the central nervous system. Concomitant use may result in increased sedation and dizziness as well as impairment of psychomotor skills.

GENERALLY AVOID: It is not known whether stiripentol may reduce theophylline and caffeine metabolism, as data on the potential for inhibition of CYP450 1A2 are limited. Consumption of foods and nutritional products such as cola drinks (which contain significant quantities of caffeine) and chocolate (which contains caffeine and trace amounts of theophylline) may be unsafe during treatment with stiripentol, particularly in children.

MANAGEMENT: Stiripentol should be taken during a meal for optimal absorption; however, it should not be taken with milk, dairy products (e.g., yogurt, soft cream cheese), fruit juice, or carbonated beverages. Patients should be advised to avoid or limit consumption of alcohol and to avoid activities requiring mental alertness such as driving or operating hazardous machinery until they know how the medication affects them. Food and beverages that may contain caffeine or theophylline such as colas, chocolate, coffee, tea, or energy drinks should also be avoided during treatment with stiripentol.

References

  1. Canadian Pharmacists Association (2006) e-CPS. http://www.pharmacists.ca/function/Subscriptions/ecps.cfm?link=eCPS_quikLink
  2. EMEA. European Medicines Agency (2007) EPARs. European Union Public Assessment Reports. http://www.ema.europa.eu/ema/index.jsp?curl=pages/includes/medicines/medicines_landingpage.jsp&mid
  3. (2018) "Product Information. Diacomit (stiripentol)." Biocodex USA

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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.