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Drug Interactions between givosiran and Vanamine PD

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

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Interactions between your drugs

Moderate

diphenhydrAMINE givosiran

Applies to: Vanamine PD (diphenhydramine) and givosiran

MONITOR: Coadministration with givosiran may increase the plasma concentrations and the risk of adverse effects of drugs that are substrates of CYP450 1A2 and/or CYP450 2D6. The proposed mechanism is decreased clearance due to givosiran-mediated inhibition of CYP450 1A2 and 2D6 isoenzymes. Concomitant administration of a single subcutaneous dose of givosiran (2.5 mg/kg) increased the systemic exposure (AUC) and peak plasma concentration (Cmax) of caffeine (sensitive CYP450 1A2 substrate) by 3.1-fold and 1.3-fold, respectively, and dextromethorphan (sensitive CYP450 2D6 substrate) by 2.4-fold and 2.0-fold, respectively.

MANAGEMENT: Caution and monitoring are recommended when givosiran is given with drugs that are substrates of CYP450 1A2 and/or 2D6. Concomitant use should generally be avoided with CYP450 1A2 or 2D6 substrates that have a narrow therapeutic range where minimal concentration changes may lead to serious or life-threatening toxicities. If concomitant use is unavoidable, the dosage of the CYP450 1A2 or 2D6 substrate should be reduced according to approved product labeling or clinical response and tolerance. Dosage adjustments as well as clinical and laboratory monitoring should be considered whenever givosiran is added to or withdrawn from therapy with these drugs.

References

  1. (2019) "Product Information. Givlaari (givosiran)." Alnylam Pharmaceuticals

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Drug and food interactions

Moderate

diphenhydrAMINE food

Applies to: Vanamine PD (diphenhydramine)

GENERALLY AVOID: Use of anticholinergic agents with alcohol may result in sufficient impairment of attention so as to render driving and operating machinery more hazardous. In addition, the potential for abuse may be increased with the combination. The mechanism of interaction is not established but may involve additive depressant effects on the central nervous system. No effect of oral propantheline or atropine on blood alcohol levels was observed in healthy volunteers when administered before ingestion of a standard ethanol load. However, one study found impairment of attention in subjects given atropine 0.5 mg or glycopyrrolate 1 mg in combination with alcohol.

MANAGEMENT: Alcohol should generally be avoided during therapy with anticholinergic agents. Patients should be counseled to avoid activities requiring mental alertness until they know how these agents affect them.

References

  1. Linnoila M (1973) "Drug effects on psychomotor skills related to driving: interaction of atropine, glycopyrrhonium and alcohol." Eur J Clin Pharmacol, 6, p. 107-12

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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.