Buffered Lidocaine injection precautions What should I know regarding pregnancy, nursing and administering Buffered Lidocaine injection to children or the elderly?If you are: Pregnant: Possibly Safe Nursing: No Known Risk: AMOUNT EXCRETED REPORTED TO BE LOW WITH LOW INFANT ORAL BIOAVAILABILITY An adult over 60: Precaution: POSSIBLE INCR. CNS/CARDIAC ADVERSE REACTIONS. CONSIDER LOWER DOSE. Giving Buffered Lidocaine injection to a child under 12: Relative Contraindication: MONITOR FOR CNS TOXICITY (E.G. RESTLESSNESS,DROWSINESS) ESP. W/CONTINUED USE.