I am experimenting with both of these meds for hives.Both work well but each have small side effects.clarinex makes me feel energetic and then about 6 hrs later I am sooooo tired.Allegra makes me dehydrated with mild headache and less energetic.But---no hives with either.Which is better? I am torn between two meds!!!!Anybody on either or have pos. and negs to tell about either?Thanks!!