GARY D. GENTZKOW, M.D.; JAMES D. STECK, M.S., R.PH.
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To the editor: Dr. Perillie's recent letter in the "Comments and Corrections" section (Ann Intern Med 85:125, 1976) was critical of this journal for publishing an advertisement for our product, Fero-Grad-500 Filmtab® (controlled release iron and 500-mg vitamin C, Abbott Laboratories). He implied that sustained-release iron preparations are ineffective in the treatment of iron deficiency.
We are not qualified to comment on sustained-release iron preparations produced by other companies. As for Fero-Grad-500 Filmtab, however, we believe substantial evidence exists showing that this produce is efficacious in the treatment of iron deficiency.
Fero-Grad-500 Filmtab contains the equivalent of 105 mg of
GENTZKOW GD, STECK JD. Fero-Grad-500 Filmtab®. Ann Intern Med. 1976;85:683–684. doi: https://doi.org/10.7326/0003-4819-85-5-683_2
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Published: Ann Intern Med. 1976;85(5):683-684.
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