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Drug Interactions between alfuzosin and Diacomit

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

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Interactions between your drugs

Moderate

alfuzosin stiripentol

Applies to: alfuzosin and Diacomit (stiripentol)

MONITOR: Coadministration with moderate inhibitors of CYP450 3A4 may increase the plasma concentrations of alfuzosin, which is primarily metabolized by the isoenzyme. Hypotension, syncope, QT prolongation, and priapism may occur. In one study, repeated oral administration of 240 mg/day of diltiazem, a moderate CYP450 3A4 inhibitor, with 7.5 mg/day (2.5 mg three times daily) of alfuzosin increased alfuzosin peak plasma concentration (Cmax) and systemic exposure (AUC) by 50% and 30%, respectively, and increased diltiazem Cmax and AUC each by 40%. No changes in blood pressure were observed in this study.

MANAGEMENT: Caution is advised if alfuzosin is prescribed in combination with moderate CYP450 3A4 inhibitors. Pharmacologic response to alfuzosin should be monitored more closely whenever a CYP450 3A4 inhibitor is added to or withdrawn from therapy, and the alfuzosin dosage adjusted as necessary. Patients should be advised to avoid rising abruptly from a sitting or recumbent position and to notify their physician if they experience dizziness, lightheadedness, orthostasis, syncope, or tachycardia. Taking alfuzosin at bedtime may minimize the occurrence of orthostatic effects. Patients should also avoid driving or operating hazardous machinery until they know how the medication affects them.

References (1)
  1. (2003) "Product Information. Uroxatral (alfuzosin)." sanofi-aventis

Drug and food interactions

Moderate

alfuzosin food

Applies to: alfuzosin

ADJUST DOSING INTERVAL: Administration of alfuzosin with food enhances oral bioavailability. According to the manufacturer, extent of absorption is 50% higher when administered under fed conditions compared to fasting conditions.

MANAGEMENT: To ensure maximal oral absorption, alfuzosin should be administered with or immediately after a meal.

References (1)
  1. (2003) "Product Information. Uroxatral (alfuzosin)." sanofi-aventis
Moderate

stiripentol food

Applies to: Diacomit (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 (3)
  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

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.