Drug Interactions between Fluxid and Toviaz
This report displays the potential drug interactions for the following 2 drugs:
- Fluxid (famotidine)
- Toviaz (fesoterodine)
Interactions between your drugs
No interactions were found between Fluxid and Toviaz. However, this does not necessarily mean no interactions exist. Always consult your healthcare provider.
Fluxid
A total of 298 drugs are known to interact with Fluxid.
- Fluxid is in the drug class H2 antagonists.
- Fluxid is used to treat the following conditions:
Toviaz
A total of 305 drugs are known to interact with Toviaz.
- Toviaz is in the drug class urinary antispasmodics.
- Toviaz is used to treat the following conditions:
Drug and food interactions
fesoterodine food
Applies to: Toviaz (fesoterodine)
MONITOR: Coadministration with moderate inhibitors of CYP450 3A4 such as grapefruit juice may increase the plasma concentrations of fesoterodine's active metabolite, 5-hydroxymethyl tolterodine, which is partially metabolized by the isoenzyme. The possibility of prolonged and/or increased pharmacologic effects of fesoterodine should be considered. Because 5-hydroxymethyl tolterodine is also metabolized by CYP450 2D6, the clinical significance of the interaction may be greater in patients who are CYP450 2D6-deficient, or so-called poor metabolizers of CYP450 2D6 (approximately 7% of Caucasians and less than 2% of Asians and individuals of African descent) who may rely more on the 3A4 metabolic pathway for clearance of the drug.
MANAGEMENT: Caution is advised if fesoterodine is administered with grapefruit or grapefruit juice. Patients should be advised to notify their physician if they experience potential adverse effects of fesoterodine such as irregular heartbeat, blurry vision, difficulty urinating, dry mouth, headache, drowsiness, dizziness, gastrointestinal upset, or constipation.
References
- (2008) "Product Information. Toviaz (fesoterodine)." Pfizer U.S. Pharmaceuticals Group
famotidine food
Applies to: Fluxid (famotidine)
H2 antagonists may reduce the clearance of nicotine. Cimetidine, 600 mg given twice a day for two days, reduced clearance of an intravenous nicotine dose by 30%. Ranitidine, 300 mg given twice a day for two days, reduced clearance by 10%. The clinical significance of this interaction is not known. Patients should be monitored for increased nicotine effects when using the patches or gum for smoking cessation and dosage adjustments should be made as appropriate.
References
- Bendayan R, Sullivan JT, Shaw C, Frecker RC, Sellers EM (1990) "Effect of cimetidine and ranitidine on the hepatic and renal elimination of nicotine in humans." Eur J Clin Pharmacol, 38, p. 165-9
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
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
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