WordNet sense 1 (perplexed by many conflicting situations or statements; filled with bewilderment):

baffled, bemused, bewildered, confounded, lost, mixed-up, mazed, at sea

WordNet sense 2 (full or difficulty or confusion or bewilderment):

perplexed

WordNet sense 3 (stupefied by alcoholic drink):

befogged

WordNet sense 4 (confused and vague; used especially of thinking):

muddled, woolly, wooly, addled, muzzy, woolly-headed, wooly-minded

WordNet sense 5 (mentally confused; unable to think with clarity or act intelligently):

confused