Abstract
Zinc sulfate was administered intravenously in 3 patients with severe conditional zinc deficiency. The dosage ranged from 10 to 20 mg ionic zinc daily, and the duration of the treatment did not exceed 2 weeks. The rise in serum zinc and urinary zinc per 24 h, as well as in serum alkaline phosphatase, occurred at a faster rate than observed in a patient who was given 135 mg zinc daily by mouth. No subjective or biochemical side effects of the intravenous zinc therapy was observed.