Do not ingest food or drink w/in 2 hr of using local anaesth. Patients w/ CV disease, especially HTN, severe bradycardia, conduction disturbances or severe digitalis intoxication. Genetic predisposition to malignant hyperthermia & pre-existing abnormal neurological conditions. Contains Na metabisulfite. Impaired kidney or liver function. Pregnancy. Elderly & debilitated patients.