What can expired Allegra do to the body?

I took two Allegras today that expired three years ago. What kind effects can that hold on the body? Generally expired medications hold no extra toxicity. Expirations are made to guarantee a certain level of efficacy. Most likely is be just not as effectual.
not much effect on the body, rather, no effect at adjectives.
You might just bring back some nausea. The active ingredient is no longer important.