-controlled hypertensive patients receiving pseudoephedrine at recommended doses do not appear at high risk for significant elevations in blood pressure, however, increased blood pressure (especially systolic hypertension) has been reported in some patients.
Chlorpheniramine; Pseudoephedrine: The cardiovascular effects of sympathomimetics may reduce the antihypertensive effects produced by angiotensin II receptor antagonists.
Clofarabine: Concomitant use of clofarabine, a substrate of OAT1 and OAT3, and valsartan, an inhibitor of OAT protein (OATP), may result in increased clofarabine levels. Therefore, monitor for signs of clofarabine toxicity such as gastrointestinal toxicity (e.g., nausea, vomiting, diarrhea, mucosal inflammation), hematologic toxicity, and skin toxicity (e.g. hand and foot syndrome, rash, pruritus) in patients also receiving valsartan.
Clopidogrel: At high concentrations in vitro, clopidogrel inhibits the activity of CYP2C9. Thus, clopidogrel could increase plasma concentrations of drugs metabolized by this isoenzyme, such as valsartan. Although there are no in vivo data with which to predict the magnitude or clinical significance of this potential interaction, caution should be used when valsartan is coadministered with clopidogrel.
Clozapine: Clozapine used concomitantly with the antihypertensive agents can increase the risk and severity of hypotension by potentiating the effect of the antihypertensive drug.
Cobicistat: Caution is warranted when cobicistat is administered with valsartan as there is a potential for increased valsartan concentrations. Valsartan is a substrate of organic anion transporting polypeptide (OATP)1B1. Cobicistat is an inhibitor of OATP.
Cobicistat; Elvitegravir; Emtricitabine; Tenofovir Alafenamide: Caution is warranted when elvitegravir is administered with valsartan as there is a potential for decreased valsartan concentrations. Valsartan is a substrate of CYP2C9; elvitegravir is a CYP2C9 inducer. Caution is warranted when cobicistat is administered with valsartan as there is a potential for increased valsartan concentrations. Valsartan is a substrate of organic anion transporting polypeptide (OATP)1B1. Cobicistat is an inhibitor of OATP.
Cobicistat; Elvitegravir; Emtricitabine; Tenofovir Disoproxil Fumarate: Caution is warranted when elvitegravir is administered with valsartan as there is a potential for decreased valsartan concentrations. Valsartan is a substrate of CYP2C9; elvitegravir is a CYP2C9 inducer. Caution is warranted when cobicistat is administered with valsartan as there is a potential for increased valsartan concentrations. Valsartan is a substrate of organic anion transporting polypeptide (OATP)1B1. Cobicistat is an inhibitor of OATP.
Cod Liver Oil: Fish oil supplements may cause mild, dose-dependent reductions in systolic or diastolic blood pressure in untreated hypertensive patients. Relatively high doses of fish oil are required to produce any blood pressure lowering effect. Additive reductions in blood pressure may be seen when fish oils are used in a patient already taking antihypertensive agents. High doses of fish oil supplements may produce a blood pressure lowering effect. It is possible that additive reductions in blood pressure may be seen when fish oils are used in a patient already taking antihypertensive agents.
Codeine; Phenylephrine; Promethazine: The cardiovascular effects of sympathomimetics may reduce |
