If it is kosher for Pesach (Passover) – It is Kosher for year around, but never the opposite.
KOSHER FOR PESACH* COUGH & ALLERGY MEDICINES
Allegra 12 Hr. & 24 Hr. tablets, Allegra Children’s Oral Suspension & tablets, Benadryl Children’s Allergy Chewables, Benadryl Allergy Ultratab tablets, Coricidin HBP – all types.
* May be use in Pesach if required