Acetaminophen, Dextromethorphan, and Doxylamine Liquid and Chlorpromazine Injection

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.

ChlorproMAZINE may increase the blood levels and effects of dextromethorphan. You may need a dose adjustment or more frequent monitoring by your doctor to safely use both medications. Contact your doctor if your condition changes or you experience increased side effects such as difficulty breathing, dizziness, drowsiness, difficulty sleeping, or diarrhea. 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.

MONITOR: Coadministration with CYP450 2D6 inhibitors may increase the plasma concentrations of dextromethorphan in patients who are extensive metabolizers of this isoenzyme (approximately 93% of Caucasians and more than 98% of Asians and individuals of African descent). The proposed mechanism is inhibition of the CYP450 2D6-mediated O-demethylation of dextromethorphan. Increased plasma concentrations increase the risk of dextromethorphan-related adverse effects (e.g., agitation, confusion, tremor, insomnia, diarrhea, and respiratory depression) and serotonin syndrome. Coadministration of dextromethorphan (60 mg orally, once) with the CYP450 2D6 inhibitor panobinostat (20 mg orally once a day on days 3, 5, and 8) in 14 patients with advanced cancer had a highly variable effect on dextromethorphan levels, increasing the peak plasma concentration (Cmax) of dextromethorphan by 20% to 200%, and total systemic exposure (AUC 0 to infinity) by 20% to 130%, compared to dextromethorphan given alone. In addition, multiple doses of the potent CYP450 2D6 inhibitor cinacalcet (50 mg daily), increased the AUC of a single 30 mg dextromethorphan dose by 11-fold in extensive metabolizers of this isoenzyme. The moderate CYP450 2D6 inhibitor asunaprevir, given at 200 mg twice daily, also increased Cmax and AUC of a single 30 mg dose of dextromethorphan by 2.7- and 3.9-fold, respectively, in 17 study subjects.

MANAGEMENT: Caution should be exercised if these drugs must be used together. Patients should be monitored for signs of dextromethorphan adverse effects (e.g., agitation, confusion, tremor, insomnia, diarrhea, and respiratory depression) and serotonin syndrome, and advised to notify their health care professional if these adverse effects develop or worsen. Dose reduction of dextromethorphan may also be required.

Acetaminophen, Dextromethorphan, and Doxylamine Liquid

Generic Name: acetaminophen / dextromethorphan / doxylamine

Brand name: All-Nite, Contac Cold+Flu Cooling Night, Coricidin HBP Nighttime Multi-Symptom Cold, Night Time Cold/Flu, Nyquil Cold & Flu, Robitussin Peak Cold Nighttime Cold + Flu, Tylenol Cold & Cough Nighttime Cool Burst, Tylenol Warming Cough & Sore Throat Nightime, Tylenol Cough & Sore Throat Nightime, Tylenol Cough & Sore Throat Night Time, NyQuil Cold/Flu Relief Cherry, NyQuil Cold/Flu Relief, Nite Time Cold & Flu, Cough & Sore Throat Nighttime, Delsym Cough-Cold Nighttime, Sunmark Nite Time Cold and Flu, Delsym Nighttime Cough & Cold, Multi-Symptom Nighttime Cold & Flu Relief, Nyquil Cold & Flu Nighttime, NyQuil Nature Fusion Cold & Flu Nighttime, Clear Cough PM Multi-Symptom, Tylenol Cough/Sore Throat

Synonyms: Acetaminophen, dextromethorphan, and doxylamine

What is Acetaminophen, Dextromethorphan, and Doxylamine Liquid?

Chlorpromazine Injection

Generic Name: chlorpromazine

Brand name: Ormazine, Thorazine, Thorazine Spansule

Synonyms: Chlorpromazine, ChlorproMAZINE

What is Chlorpromazine Injection?