Drug interactions between Unisom SleepMelts and Zytiga
| Results for the following 2 drugs: |
|---|
| Unisom SleepMelts (diphenhydramine) |
| Zytiga (abiraterone) |
Interactions between your selected drugs
diphenhydramine ↔ abiraterone
Applies to:Unisom SleepMelts (diphenhydramine) and Zytiga (abiraterone)
MONITOR: Coadministration with abiraterone acetate may increase the plasma concentrations of drugs that are substrates of the CYP450 2D6 isoenzyme. The mechanism is decreased clearance due to inhibition of CYP450 2D6 activity by abiraterone. When dextromethorphan, a CYP450 2D6 substrate, was given with abiraterone acetate 1,000 mg daily and prednisone 5 mg twice daily, dextromethorphan peak plasma concentration (Cmax) and systemic exposure (AUC) increased by 2.8- and 2.9-fold, respectively, compared to administration alone.
MANAGEMENT: Caution is advised if abiraterone acetate must be used concurrently with drugs that undergo metabolism by CYP450 2D6. Dosage adjustments as well as clinical and laboratory monitoring may be appropriate for some drugs whenever abiraterone acetate is added to or withdrawn from therapy. Concomitant use of abiraterone acetate and substrates of CYP450 2D6 with a narrow therapeutic index (e.g., antiarrhythmics) should be avoided if possible.
See also...
Drug Interaction Classification
The classifications below are a guideline only. The relevance of a particular drug interaction to a specific patient is difficult to determine using this tool alone given the large number of variables that may apply.
| 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. |
Do not stop taking any medications without consulting your healthcare provider.
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