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Drug Interactions between fosphenytoin and Gralise

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

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Interactions between your drugs

Moderate

gabapentin fosphenytoin

Applies to: Gralise (gabapentin) and fosphenytoin

MONITOR: One case report described elevated serum phenytoin concentrations in a patient also receiving gabapentin; however, the manufacturer reports that the two drugs do not affect each other. The mechanism of the interaction is unknown.

MANAGEMENT: The clinician may consider closer clinical and laboratory monitoring of patients receiving gabapentin and phenytoin. The dose of phenytoin should be adjusted as needed. Patients should be advised to notify their physician if they experience signs of phenytoin toxicity (e.g., dizziness, imbalance, dysarthria, nystagmus, or ataxia).

References

  1. (2001) "Product Information. Neurontin (gabapentin)." Parke-Davis
  2. Tyndel F (1994) "Interaction of gabapentin with other antiepileptics." Lancet, 343, p. 1363-4

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Drug and food interactions

Moderate

gabapentin food

Applies to: Gralise (gabapentin)

GENERALLY AVOID: Alcohol may potentiate some of the pharmacologic effects of CNS-active agents. Use in combination may result in additive central nervous system depression and/or impairment of judgment, thinking, and psychomotor skills.

MANAGEMENT: Patients receiving CNS-active agents should be warned of this interaction and advised to avoid or limit consumption of alcohol. Ambulatory patients should be counseled to avoid hazardous activities requiring complete mental alertness and motor coordination until they know how these agents affect them, and to notify their physician if they experience excessive or prolonged CNS effects that interfere with their normal activities.

References

  1. Warrington SJ, Ankier SI, Turner P (1986) "Evaluation of possible interactions between ethanol and trazodone or amitriptyline." Neuropsychobiology, 15, p. 31-7
  2. Gilman AG, eds., Nies AS, Rall TW, Taylor P (1990) "Goodman and Gilman's the Pharmacological Basis of Therapeutics." New York, NY: Pergamon Press Inc.
  3. (2012) "Product Information. Fycompa (perampanel)." Eisai Inc
  4. (2015) "Product Information. Rexulti (brexpiprazole)." Otsuka American Pharmaceuticals Inc
View all 4 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.

See also

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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.

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