The classic example is a patient who has an allergy to an inactive ingredient in an approved drug and needs a version of the drug without that allergen, says Zettler
Image: Peter Dazeley/Getty Images About the Author Marygrace Taylor, Health Writer About the Reviewer Pieter Cohen, MD, Contributor Disclaimer: As a service to our readers, Harvard Health Publishing provides access to our library of archived content
doi: 10.1046/j.1365-2125.2003.01907.x Georges Delpre, Pinhas Stark, Yaron Niv, Sublingual therapy for cobalamin deficiency as an alternative to oral and parenteral cobalamin supplementation, The Lancet, Volume 354, Issue 9180, 28 August 1999, Pages 740-741, ISSN 0140-6736,
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