Blue Tongue Sign | definition of Blue Tongue Sign by Medical dictionary
Blue Tongue Sign
A strikingly blue tongue due to selective D2 dopamine antagonism, which causes a dystonic reaction, accompanied by trismus, torticollis, facial spasms, opisthotonus and oculogyric crises. The blue tongue sign occurs in 1:500 young women treated with metoclopramide; blue tongues have been anecdotally associated with haloperidol therapy
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