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Comment on: “Levothyrox® New and Old Formulations: Are they Switchable for Millions of Patients?”

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A Letter to the Editor to this article was published on 27 August 2019

The Original Article was published on 04 April 2019

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References

  1. Concordet D, Gandia P, Montastruc J-L, Bousquet-Mélou A, Lees P, Ferran A, et al. Levothyrox new and old formulations: are they switchable for millions of patients? Clin Pharmacokinet. 2019;58(7):827–33. https://doi.org/10.1007/s40262-019-00747-3(Epub 4 Apr 2019).

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  2. FDA Guidance document “Statistical Approaches to Establishing Bioequivalence”. 2001. https://www.fda.gov/regulatory-information/search-fda-guidance-documents/statistical-approaches-establishing-bioequivalence. Accessed 20 June 2019.

  3. ANSM Levothyrox public report. https://www.ansm.sante.fr/content/download/110115/1395469/version/1/file/Rapport+d%C3%A9valuation+bioequivalence+_+Levothyrox.pdf. Accessed 20 June 2019.

  4. ANSM: Contrôle de la nouvelle formule de Lévothyrox commercialisée à partir de mars 2017: note de synthèse 17-A-12th September 2017. file:///C:/Users/502264/Downloads/Rapport%20danalyse%20Agence%20(CTROL)%20_%20Levothyrox.pdf.

  5. Pharmacovigilance report: third report 6/7/2018 Comité technique de pharmacovigilance du 06/07/2018. http://www.ansm.sante.fr. Accessed 20 June 2019.

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Authors and Affiliations

  1. Pharmacology, Clinical Research and Innovation Delegation, St Louis Hospital, Paris-Diderot University, Assistance Publique-Hôpitaux de Paris, 1 avenue Claude Vellefaux, 75475, Paris Cedex 10, France

    Philippe Lechat

  2. Clinical Research Unit, Pitié-Salpêtrière University Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France

    Jacques Ropers

  3. Pharmacology and Toxicology, Centre Hospitalier Intercommunal de Créteil, Créteil, France

    Jérome Barré

  4. Internal Medicine, Paris-Diderot University, Groupe Hospitalier Lariboisière-Saint-Louis-Fernand-Widal, Paris, France

    Stephane Mouly

Authors
  1. Philippe Lechat
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  2. Jacques Ropers
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  3. Jérome Barré
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  4. Stephane Mouly
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Corresponding author

Correspondence to Philippe Lechat.

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Funding

No external funding was used in the preparation of this letter.

Conflict of interest

Philippe Lechat, Jacques Ropers, Jérome Barré, and Stephane Mouly declare that they have no potential conflicts of interest that might be relevant to the contents of this letter.

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Lechat, P., Ropers, J., Barré, J. et al. Comment on: “Levothyrox® New and Old Formulations: Are they Switchable for Millions of Patients?”. Clin Pharmacokinet 58, 1351–1352 (2019). https://doi.org/10.1007/s40262-019-00814-9

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  • DOI: https://doi.org/10.1007/s40262-019-00814-9

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