yea that crossed my mind also, but im already drowsy from the vic's, if i add an anti-histamine, it'll put me to sleep
claratin (loratadine) and other non-drowsy anti-histamines are available. in fact, most of the sedating anti-histamines (hydroxyzine, promethazine, doxylamine) arent even available in 99% of pharmacies ive been to.