Does taking my Allegra with coca-cola have any effects, negative or otherwise on the absorption of the Allegra? I m wondering because of the recent controversy regarding Allegra being consumed with fruit juices. I m a 5 1 , 120lb, 44yr old female with indoor/outdoor allergies. I take one Allegra(24hr/generic) and two sudafed(also generic) each morning on an empty stomach for my symptoms, and drink one can of Coke at that time.