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Lookup NU author(s): Dr Salman Razvi
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
© 2024 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.Levothyroxine (LT4), being “narrow therapeutic index” drug, may lead to significant fluctuations in thyroid stimulating hormone (TSH) levels. Such fluctuations can result in clinically noteworthy disruptions in thyroid function and give rise to adverse clinical consequences. Consequently, regulatory standards for LT4 potency have been tightened, with the most stringent specifications requiring maintenance of potency within the range of 95–105% of the labeled dose throughout the entire shelf-life of the product. The LT4 new formulation with tightened specification adheres to these rigorous standards, demonstrating established bioequivalence to its older formulation while upholding an equivalent standard of safety and efficacy. Furthermore, the novel formulation exhibits enhanced stability and an extended shelf-life. Of paramount significance is its capacity to provide patients with accurate and consistent dosing, thereby effectively catering to their medical requirements. The primary objective of the Asia-Pacific advisory board meeting (held in June 2022 with endocrinologists, experts from India, Indonesia, Philippines, Thailand, Malaysia and Singapore) was to establish the importance of appropriate communication to HCPs, patients and other stakeholders regarding the LT4 new formulation. The aim of this brief review is to highlight the importance of communication with healthcare professionals that should focus on providing accurate information on the LT4 new formulation, emphasizing efficacy, safety, and bioequivalence with clear guidance and ensure that patients and clinicians are fully informed about any changes to medications such as LT4 to reduce the risk of unrelated adverse events being incorrectly attributed to the newer formulation.
Author(s): Razvi S, Nicodemus N, Ratnasingam J, Arundhati D, Soh WEA, Kunavisarut T, Zufry H, Chaudhari H, Markova A
Publication type: Article
Publication status: Published
Journal: Current Medical Research and Opinion
Year: 2024
Volume: 40
Issue: 9
Pages: 1533-1536
Online publication date: 07/08/2024
Acceptance date: 08/07/2024
Date deposited: 19/08/2024
ISSN (print): 0300-7995
ISSN (electronic): 1473-4877
Publisher: Taylor and Francis Ltd.
URL: https://doi.org/10.1080/03007995.2024.2378984
DOI: 10.1080/03007995.2024.2378984
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