FDA -- I has cats, no dogs...

-- It turns out that I am allergic to dogs -- but not cats.
-- It turns out that I'm allergic to the medication which was prescribed to help manage the allergy to dogs.
-- It turns out that the FDA would like to be informed of adverse events associated with prescription medication.

FDA MedWatch
or call 1-800-FDA-1088

"Your health care provider is NOT required to report to the FDA. In these situations, you may complete the Online Reporting Form yourself." -- FDA MedWatch