Allegra-D tablets in their stool

July 2001

Some patients are concerned about seeing Allegra-D tablets in their stool. What they're noticing is a "ghost tablet."

It's the shell of the tan half of Allegra-D that contains extended-release pseudoephedrine. The tan half slowly releases the drug from an insoluble wax matrix that can show up in the stool.

The white half of Allegra-D is immediate-release fexofenadine. It breaks off in the GI tract and dissolves completely.

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Allegra-D tablets in their stool

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