Pseudoephedrine For Cats. Overview of phenylephrine for dogs and cats. As a guideline, a cat should ingest half a milliliter of the medicine for every pound she weighs.

Phenylephrine may also be used with other drugs such as atropine, to dilate the pupil prior to certain eye. Pupil dilation is performed during some portions of an eye examination. 4 the same is true for prostatic hypertrophy 4.pseudoephedrine may worsen the following conditions: