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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 03 June 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. Epub 2019 Apr 4. https://doi.org/10.1007/s40262-019-00747-3.

  2. Gottwald-Hostalek U, Uhl W, Wolna P, Kahaly GJ. New levothyroxine formulation meeting 95-105% specification over the whole shelf-life: results from two pharmacokinetic trials. Curr Med Res Opin. 2017;33:169–74.

    Article  CAS  Google Scholar 

  3. Guidance for Industry. Draft guidance on levothyroxine sodium. https://www.accessdata.fda.gov/drugsatfda_docs/psg/Levothyroxine_draft_Oral tab_RLD 021116 021210 021301 021342 321402_RC12-14.pdf. Accessed 24 May 2019.

  4. Jiang W, Makhlouf F, Schuirmann DJ, Zhang X, Zheng N, Conner D, et al. A bioequivalence approach for generic narrow therapeutic index drugs: evaluation of the reference-scaled approach and variability comparison criterion. AAPS J. 2015;17(4):891–901.

    Article  CAS  Google Scholar 

  5. Peeters RP, Visser TJ. Metabolism of thyroid hormone [Updated 2017 Jan 1]. In: Feingold KR, Anawalt B, Boyce A, et al., editors. Endotext. South Dartmouth: MDText.com, Inc.; 2000. https://www.ncbi.nlm.nih.gov/books/NBK285545/. Accessed 24 May 2019.

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Correspondence to Patrick Nicolas.

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

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Patrick Nicolas declares no potential conflicts of interest relating to this letter.

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Nicolas, P. Comment on: “Levothyrox® New and Old Formulations: Are they Switchable for Millions of Patients?”. Clin Pharmacokinet 58, 959–960 (2019). https://doi.org/10.1007/s40262-019-00778-w

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  • DOI: https://doi.org/10.1007/s40262-019-00778-w

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