Allergies Home > Allegra-D Drug Interactions

When medications such as beta blockers or ketoconazole are taken together with Allegra-D, drug interactions may potentially occur. These interactions can cause your body to metabolize the medicines differently than intended, significantly increase Allegra-D levels in your body, or reduce the effectiveness of the drugs. Other medications that may cause potential Allegra-D drug interactions include erythromycin, mecamylamine, digoxin, and antacids containing aluminum and magnesium.


An Overview of Allegra-D Drug Interactions

Allegra-D® (fexofenadine and pseudoephedrine) has a number of other medicines that it can potentially interact with. Some possible Allegra-D drug interactions can include:


Allegra-D Interactions Explained


Ketoconazole (Nizoral)
Taking ketoconazole and Allegra-D together may cause your body to metabolize the medicines differently than intended. This can result in an increased amount of Allegra-D in your body. If you are taking these medications together, your healthcare provider may choose to monitor you more closely or make necessary dosing adjustments.
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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