NBDHE Review Questions: Quiz 237 May 18, 2016 by Hassan Shah The use of a retraction cord impregnated with 8% racemic epinephrine may be hazardous for some patients because of its A. local caustic action on the gingival tissue. B. propensity for causing an allergic response. C. potential for systemic action. D. local astringent action. E. None of the above Δ