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Acetaminophen, Dextromethorphan, and Phenylephrine Pods and Bextra

Determining the interaction of Acetaminophen, Dextromethorphan, and Phenylephrine Pods and Bextra and the possibility of their joint administration.

Check result:
Acetaminophen, Dextromethorphan, and Phenylephrine Pods <> Bextra
Relevance: 26.12.2023 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:

Consumer information for this minor interaction is not currently available. Some minor drug interactions may not be clinically relevant in all patients. Minor drug interactions do not usually cause harm or require a change in therapy. However, your healthcare provider can determine if adjustments to your medications are needed.

Professional:

According to the manufacturer, the coadministration with valdecoxib 40 mg twice a day for 7 days has been shown to significantly increase the plasma concentrations of dextromethorphan. The proposed mechanism is decreased clearance of dextromethorphan due to inhibition of the CYP450 2D6 enzymatic pathway by valdecoxib at high dosages. However, the dextromethorphan levels reported were still almost 5-fold lower than those observed in CYP450 2D6 poor metabolizers. No particular intervention should be necessary when valdecoxib is administered under normal circumstances with dextromethorphan. At unusually high dosages of valdecoxib, there may be a theoretical risk of increased adverse effects of dextromethorphan such as drowsiness, dizziness, excitation, mental confusion, and respiratory depression. Parecoxib, a prodrug of valdecoxib, may also interact.

References
  • "Product Information. Bextra (valdecoxib)." Pharmacia Corporation, Peapack, NJ.
Acetaminophen, Dextromethorphan, and Phenylephrine Pods

Generic Name: acetaminophen / dextromethorphan / phenylephrine

Brand name: Comtrex Cold & Cough, DayQuil Cold & Flu, Daytime, Flu & Severe Cold & Cough Daytime Powder, Mapap Cold Formula, Robitussin Peak Cold Daytime Cold + Flu, Sudafed PE Pressure+Pain+Cough, Theraflu Daytime Severe Cold & Cough, Theraflu Warming Severe Cold Daytime, Tylenol Cold Multi-Symptom Daytime, Vicks Dayquil Liquicaps Cold/Flu, Contac Complete Cough, Cold & Flu Extra Strength, Tylenol Cold Daytime, Neocitran Non Drowsy Extra Strength Cold and Flu, Tylenol Cold Daytime Extra Strength, Tylenol Flu Daytime Extra Strength, Theraflu Nighttime Severe Cold & Cough, Theraflu Warming Relief Daytime Multi-Symptom Cold, Tylenol Children's Plus Cold & Cough, Theraflu Multi-Symptom Severe Cold, Day Time Cold & Flu, DayQuil Nature Fusion Cold & Flu, Theraflu ExpressMax Day Cold & Cough, Tylenol Cold Max Day, Mucinex Fast-Max Severe Cold and Sinus, Mucinex Fast-Max Congestion and Headache, Theraflu PowerPods Daytime Severe Cold, Comtrex Cold and Cough Maximum Strength, Vicks DayQuil Multi-Symptom Cold/Flu Relief

Synonyms: Acetaminophen, dextromethorphan, and phenylephrine

Bextra

Generic Name: valdecoxib

Brand name:

Synonyms: n.a.

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.