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Dilantin Infatabs and Zegerid OTC

Determining the interaction of Dilantin Infatabs and Zegerid OTC and the possibility of their joint administration.

Check result:

Dilantin Infatabs <> Zegerid OTC

Relevance: 04.07.2023 Reviewer: Shkutko P.M., M.D., in

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:

Before taking phenytoin, tell your doctor if you also use omeprazole. You may need dose adjustments or special tests in order to safely take both medications together. This combination may increase your phenytoin levels. You should notify your doctor if you have symptoms such as drowsiness, visual problems, changes in behavior, nausea, or poor muscle coordination. It is important that you tell your healthcare provider about all other medications that you are using including vitamins and herbs. Do not stop using your medications without first talking to your doctor first.

Professional:

MONITOR: Omeprazole may increase phenytoin serum concentrations and the risk of toxicity. The proposed mechanism is decreased clearance due to omeprazole-mediated inhibition of CYP450 2C19. Omeprazole may interact in a similar manner with other hydantoins. The clinical significance is unknown; however, higher omeprazole doses (more than 40 mg/day) may be more likely to interact.

MANAGEMENT: Clinical and laboratory monitoring may be appropriate whenever omeprazole is added to or withdrawn from therapy with phenytoin. Dosage adjustments may be considered if an interaction is suspected. Patients should be advised to notify their doctor if they experience symptoms of phenytoin toxicity (e.g., drowsiness, visual disturbances, change in mental status, seizures, nausea, or ataxia).

References

Prichard PJ, Walt RP, Kitchingman GK, et al. "Oral phenytoin pharmacokinetics during omeprazole therapy." Br J Clin Pharmacol 24 (1987): 543-5
Cerner Multum, Inc. "Australian Product Information." O 0
Gugler R, Jensen JC "Omeprazole inhibits oxidative drug metabolism: studies with diazepam and phenytoin in vivo and 7-ethoxycoumarin in vitro." Gastroenterology 89 (1985): 1235-41
"Product Information. Prilosec (omeprazole)." Merck & Co, Inc, West Point, PA.
Andersson T "Omeprazole drug interaction studies." Clin Pharmacokinet 21 (1991): 195-212
Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0

Dilantin Infatabs

Generic Name: phenytoin

Brand name: Dilantin, Phenytek, Dilantin Infatabs, Phenytoin Sodium, Prompt

Synonyms: Dilantin

What is Dilantin Infatabs?

Zegerid OTC

Generic Name: omeprazole / sodium bicarbonate

Brand name: Zegerid, Zegerid OTC

Synonyms: n.a.

What is Zegerid OTC?

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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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