Fosphenytoin Injection and Singulair (Montelukast Oral Granules)
Determining the interaction of Fosphenytoin Injection and Singulair (Montelukast Oral Granules) and the possibility of their joint administration.
In the database of official manuals used in the service creation an interaction registered by statistical results of studies was found, which can either lead to negative consequences for the patient health or strengthen a mutual positive effect. A doctor should be consulted to address the issue of joint drug administration.
Consumer:Fosphenytoin may reduce the blood levels and effects of montelukast. Contact your doctor if your symptoms worsen or your condition changes during treatment with these medications. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.
Professional:MONITOR: Coadministration with inducers of hepatic CYP450 isoenzymes may decrease the plasma concentrations of montelukast, which is metabolized by CYP450 2C8, 2C9, and 3A4 . When a single 10 mg dose of montelukast was administered in combination with phenobarbital, montelukast systemic exposure (AUC) decreased by approximately 40%.
MANAGEMENT: No dosage adjustment for montelukast is recommended when used concomitantly with CYP450 inducers. However, clinical monitoring for potentially reduced therapeutic effects may be appropriate, especially for potent inducers such as carbamazepine, dexamethasone, enzalutamide, phenobarbital, phenytoin, rifamycins, and St. John's wort.
- "Product Information. Singulair (montelukast)." Merck & Co, Inc, West Point, PA.
Generic Name: fosphenytoin
Brand name: Cerebyx
Synonyms: Fosphenytoin
Generic Name: montelukast
Brand name: Singulair
Synonyms: Singulair
In the course of checking the drug compatibility and interactions, data from the following reference sources was used: Drugs.com, Rxlist.com, Webmd.com, Medscape.com.
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