This medicine is most effective if started before contact with the allergen. Take at least 1-3 hours before. Make sure you are drinking enough liquids unless told to drink less by healthcare provider. Avoid products with caffeine. Do not take more than prescribed amount.
Liver damage can occur.
Take a missed dose as soon as possible. If it is almost time for the next dose, skip the missed one. Return to your regular schedule. Do not take a double dose or extra doses. Wear disease medical alert identification for allergies.