ATC codes: J04AD03
Multi-drug resistant tuberculous Mycobacterium ICD11 code: ML32.00
Complementary Protionamide may be an alternative.
Oral > Solid: 125 mg tablet ; 250 mg tablet ; 125 mg tablet (dispersible)
EML status history
Also recommended for children
The recommendation is for this specific medicine
Patents have expired in most jurisdictions
Read more about patents.
Expert Committee recommendation
The Expert Committee recommended the addition of the proposed dispersible tablet formulations of ethambutol and isoniazid to the core list of the EMLc, and of cycloserine, ethionamide, levofloxacin, linezolid and moxifloxacin to the complementary list of the EMLc for the treatment of children with drug-sensitive and drug-resistant TB. The Committee considered that the availability of quality-assured, ageappropriate formulations will help improve access to effective treatment for children with TB.
The application requested the addition of various new formulations of currently listed medicines for tuberculosis (TB) for use in children, including ethionamide dispersible tablets 125 mg. All of the medicines for which additional formulations are requested for listing are currently included on the Model Lists in various formulations and strengths. In 2007, the World Health Assembly called for WHO to promote the development of child-friendly medicines with a particular focus on treatment for HIV, tuberculosis, malaria and chronic disease (1). In 2017, the Expert Committee recommended the addition to the EMLc of two fixed-dose combination, child-friendly dispersible tablet formulations of isoniazid + rifampicin +/– pyrazinamide for use in children with drug-sensitive tuberculosis infection. The Committee considered that the availability of these age-appropriate formulations would offer benefits including appropriate dosing, ease of administration and reduced pill burden (2).
Public health relevance
It is estimated that of the 10 million people who developed TB in 2017, 1 million of them were children. Children aged <15 years accounted for 7.1% of the 6.4 million new or relapsed cases of TB notified to national TB programmes and reported to WHO. Children aged <15 years accounted for 15% and 10% of total TB deaths among HIV-negative and HIV-positive people, respectively – higher than their share of estimated cases, suggesting poorer access to diagnosis and treatment (3).
Evidence for the clinical effectiveness of the medicines was evaluated at the time of their individual listings. Paediatric-friendly formulations The proposed new formulations are mostly dispersible formulations, meaning they can be mixed in liquid, making it easier to get the correct doses and for children to swallow. They are flavoured to overcome the bitterness associated with breaking, crushing and otherwise manipulating adult formulations. The proposed formulations are at lower strengths, aligned with the dosing needs of children according to the 2019 update of the WHO consolidated guidelines on drug-resistant tuberculosis treatment (4). With the exception of linezolid 150 mg dispersible tablet (which is still in development), the proposed formulations are all quality-assured, either through the WHO Prequalification for Medicines Programme, or by the Global Fund Expert Review Panel.
Evidence for the safety of the medicines was evaluated at the time of their individual listings.
Cost / cost effectiveness
No information was provided in the application.
These medicines are all recommended the most recent WHO guidelines for treatment of drug-sensitive tuberculosis (2017) (5), treatment of latent TB infection (2018) (6), treatment of isoniazid mono-resistant TB (2018) (7) and treatment of drug-resistant TB (2019) (4).
The proposed new formulations are in the Stop TB Partnership’s Global Drug Facility product catalogue and are reportedly being procured by programmes.
1. Resolution WHA60.20. Better medicines for children. In: Sixtieth World Health Assembly, Geneva, 14–23 May 2007. Resolutions and decisions. Geneva: World Health Organization; 2007. Available from: http://apps.who.int/gb/ebwha/pdf_files/WHASSA_WHA60-Rec1/E/reso-60-en. pdf, accessed 30 October 2019. 2. The selection and use of essential medicines. Report of the WHO Expert Committee, 2017 (including the 20th WHO Model List of Essential Medicines and the 6th WHO Model List of Essential Medicines for Children) (WHO Technical Report Series, No. 1006). Geneva: World Health Organization; 2017. Available from https://apps.who.int/iris/bitstream/handle/10665/ 259481/9789241210157-eng.pdf, accessed 30 October 2019. 3. Global tuberculosis report 2018. Geneva: World Health Organization; 2018. Available from https://apps.who.int/iris/bitstream/handle/10665/274453/9789241565646-eng.pdf, accessed 30 October 2019. 4. WHO consolidated guidelines on drug-resistant tuberculosis treatment. Geneva: World Health Organization; 2019. Available from: https://apps.who.int/iris/bitstream/handle/10665/ 311389/9789241550529-eng.pdf, accessed 30 October 2019. 5. Guidelines for treatment of drug-susceptible tuberculosis and patient care, 2017 update. Geneva: World Health Organization; 2017. Available from: https://apps.who.int/iris/bitstream/ handle/10665/255052/9789241550000-eng.pdf, accessed 30 October 2019). 6. Latent tuberculosis infection: Updated and consolidated guidelines for programmatic management. Geneva: World Health Organization; 2018. Available from https://www.who.int/ tb/publications/2018/latent-tuberculosis-infection/en/, accessed 30 October 2019. 7. WHO treatment guidelines for isoniazid-resistant tuberculosis: Supplement to the WHO treatment guidelines for drug-resistant tuberculosis. Geneva: World Health Organization; 2018. Available from: https://apps.who.int/iris/bitstream/handle/10665/260494/9789241550079-eng. pdf, accessed 30 October 2019.