Drug Interactions between abiraterone and Nytol QuickCaps
This report displays the potential drug interactions for the following 2 drugs:
- abiraterone
- Nytol QuickCaps (diphenhydramine)
Interactions between your drugs
diphenhydrAMINE abiraterone
Applies to: Nytol QuickCaps (diphenhydramine) and abiraterone
GENERALLY AVOID: Coadministration with abiraterone acetate may increase the plasma concentrations of CYP450 2D6 substrates via inhibition of this isoenzyme. This may increase the risk of adverse reactions for drugs that are metabolized by CYP450 2D6 (e.g., metoprolol, propranolol, desipramine, venlafaxine, haloperidol, risperidone, propafenone, flecainide). 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. Conversely, drugs that utilize CYP450 2D6 to form their active metabolites may have reduced efficacy (e.g., codeine, oxycodone, tramadol).
MANAGEMENT: Concurrent therapy of abiraterone acetate with CYP450 2D6 substrates, particularly those for which minimal changes in concentration could lead to serious toxicities, is not generally recommended. If an alternative treatment cannot be used, a dose adjustment and an increase in monitoring of the CYP450 2D6 substrate should be considered. Consult the prescribing information for more specific recommendations.
References
- (2011) "Product Information. Zytiga (abiraterone)." Centocor Inc
- (2023) "Product Information. Akeega (abiraterone-niraparib)." Janssen Biotech, Inc.
- (2023) "Product Information. Akeega (abiraterone-niraparib)." Janssen Inc
- (2021) "Product Information. Zytiga (abiraterone)." Janssen Biotech, Inc.
- (2022) "Product Information. Yonsa (abiraterone)." Sun Pharmaceutical Industries
- (2023) "Product Information. Apo-Abiraterone (abiraterone)." Apotex Inc
- (2021) "Product Information. Zytiga (abiraterone)." Janssen-Cilag Pty Ltd
- (2023) "Product Information. Abiraterone (abiraterone)." Wockhardt UK Ltd
- (2023) "Product Information. Yonsa Mpred (abiraterone-methylprednisolone)." Sun Pharma ANZ Pty Ltd
Drug and food interactions
abiraterone food
Applies to: abiraterone
ADJUST DOSING INTERVAL: Food may significantly increase the oral bioavailability of some formulations of abiraterone acetate. Compared to administration in the fasted state, abiraterone peak plasma concentration (Cmax) and systemic exposure (AUC) were approximately 7- and 5-fold higher, respectively, when a single dose of abiraterone acetate was administered with a low-fat meal (7% fat; 300 calories) and approximately 17- and 10-fold higher, respectively, when it was administered with a high-fat meal (57% fat; 825 calories). Given the normal variation in the content and composition of meals, taking abiraterone acetate with meals has the potential to result in increased and highly variable exposures. The safety of these increased exposures during multiple dosing has not been assessed. However, the abiraterone acetate 125 mg tablet, commonly marketed as Yonsa, was found to have an approximately 6.5-fold higher Cmax and 4.4-fold higher AUC when a single dose of 500 mg (4 tablets) was administered with a high-fat meal (56% - 60% fat, 900 - 1000 calories) compared to overnight fasting in healthy volunteers. These differences were not considered clinically significant for this formulation.
MANAGEMENT: Some formulations of abiraterone acetate must be taken on an empty stomach. No food should be consumed for at least two hours before and one hour after the abiraterone acetate dose. However, the abiraterone acetate 125 mg tablet, commonly marketed as Yonsa, can be taken with or without food. The manufacturer's product labeling should be consulted for specific guidance.
References
- (2011) "Product Information. Zytiga (abiraterone)." Centocor Inc
- (2023) "Product Information. Akeega (abiraterone-niraparib)." Janssen Biotech, Inc.
- (2023) "Product Information. Akeega (abiraterone-niraparib)." Janssen Inc
- (2021) "Product Information. Zytiga (abiraterone)." Janssen Biotech, Inc.
- (2022) "Product Information. Yonsa (abiraterone)." Sun Pharmaceutical Industries
- (2023) "Product Information. Apo-Abiraterone (abiraterone)." Apotex Inc
- (2021) "Product Information. Zytiga (abiraterone)." Janssen-Cilag Pty Ltd
- (2023) "Product Information. Abiraterone (abiraterone)." Wockhardt UK Ltd
- (2023) "Product Information. Yonsa Mpred (abiraterone-methylprednisolone)." Sun Pharma ANZ Pty Ltd
diphenhydrAMINE food
Applies to: Nytol QuickCaps (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
- 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
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.
See also
Drug Interaction Classification
Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. | |
Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. | |
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. | |
No interaction information available. |
Further information
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