Meanwhile,
Cynomel arrested october 2025 replaced:
The Sanofi Winthrop Industry laboratory informed the National Agency for the Safety of Medicines. Moreover, Health Products (ANSM) of stopping cynomel marketing from October 31, 2025. Furthermore, To ensure the continuity of patient treatments, imports of Thybon 20 Henning are organized by the Sanofi laboratory. Meanwhile, There will therefore be no supply break between the end of Cynomel distribution. Therefore, the start of the provision of Thybon.
Presentation of Thybon 20 Henning: points of attention – Cynomel arrested october 2025 replaced
While Cynomel contains sodium liothyronine at 25 µg (which is equivalent to 24.18 µg of Liothyronine Base), Thybon 20 of the Henning laboratory contains chlorhydrate liothyronine dosed at 20 µg (equivalent to 18.94 µg of Lithyronine Base). In addition, It comes in a box of 50 kiséable tablets, against 30 quadrisecable tablets for cynomel. As a reminder. Liothyronine is used in adults and children over 6 years of age to cynomel arrested october 2025 replaced treat hypothyroidies, certain goitters and nodules. In case of necessary dosage adjustment, medical advice and appropriate hormonal dosages are required. The use of a plot is recommended, without guarantee of perfectly equal cuts.
Note that Thybon 20, unlike Cynomel, contains castor oil which can cause a risk of allergic reaction in certain patients. Liothyronine being contraindicated during pregnancy, levothyroxine should be used in this case.
In practice: patient care at the counter
Patients treated by Cynomel will have to obtain a new prescription from their. doctor for Thybon 20 Henning. The latter has a marketing authorization (AMM) in Germany for over 25 years. To ensure lasting access. the Sanofi laboratory is committed to organizing its importation, as long as it obtains its marketing authorization in France.
The doctor will prescribe assays of thyroid hormones (TSH. T4, T3) systematically 6 to 8 weeks after the start of treatment or after any change of dose, cynomel arrested october 2025 replaced and in the event of a significant variation in the weight or clinical signs of thyroid imbalance. Regular monitoring during treatment will adjust the dose taking into account the patient’s feeling.
Vigilance: risk of drug error with L-Thyroxin Henning
The boxes of Thybon 20 Henning (Lithyronine). L-Thyroxin Henning (levothyroxine), both from the Sanofi laboratory, are very similar. Patients should be made aware of this risk of confusion, especially if they simultaneously take these two treatments.
To reduce this risk. the laboratory will affix a label in French on the packaging written in German of Thybon 20 Henning and include a letter and an information note in French on the precautions for use.
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