I.N.H. precautions What should I know regarding pregnancy, nursing and administering I.N.H. to children or the elderly?If you are: Pregnant: Only When Necessary Nursing: Precaution: MONITOR INFANT FOR HEPATOTOXICITY AND NEURITIS An adult over 60: Precaution: HIGHEST INCIDENCE OF HEPATITIS AGE > 50 YEARS. MONITOR LFTS CLOSELY. Giving I.N.H. to a child under 12: Warning: SUPPLEMENT PYRIDOXINE IF INFANT IS BREASTFED EXCLUSIVELY.