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Nelfinavir Mesylate and Phenobarbital Sodium

Determining the interaction of Nelfinavir Mesylate and Phenobarbital Sodium and the possibility of their joint administration.

Check result:
Nelfinavir Mesylate <> Phenobarbital Sodium
Relevance: 09.08.2022 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:

Talk to your doctor before using nelfinavir together with PHENobarbital. Combining these medications can decrease the blood levels of nelfinavir, which may reduce its effectiveness in treating HIV infection. 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:

GENERALLY AVOID: Coadministration with phenobarbital is expected to decrease the plasma concentrations of nelfinavir. The proposed mechanism involves induction of the CYP450 3A4-mediated metabolism of nelfinavir by phenobarbital, which is considered a potent inducer of the isoenzyme. However, the interaction has not been reported in the medical literature, and no data are available from pharmacokinetic studies.

MANAGEMENT: Given the lack of pharmacokinetic data and the risk of reduced viral susceptibility and resistance development associated with subtherapeutic antiretroviral drug levels, it may be preferable to avoid using nelfinavir in combination with phenobarbital. Caution is advised if concomitant use is required. In patients already receiving nelfinavir as part of their HIV treatment regimen, close clinical and laboratory monitoring of antiretroviral response is recommended following the addition or discontinuation of phenobarbital.

References
  • "Product Information. Viracept (nelfinavir)." Agouron Pharma Inc, La Jolla, CA.
  • Cerner Multum, Inc. "UK Summary of Product Characteristics." O 0
  • Canadian Pharmacists Association "e-CPS. Available from: URL: http://www.pharmacists.ca/function/Subscriptions/ecps.cfm?link=eCPS_quikLink."
Nelfinavir Mesylate

Generic Name: nelfinavir

Brand name: Viracept

Synonyms: Nelfinavir

Phenobarbital Sodium

Generic Name: phenobarbital

Brand name: Solfoton, Luminal

Synonyms: Phenobarbital, PHENobarbital

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.

Interaction with food and lifestyle