A new drug has been added to the list of priority drugs used for treating those suffering from multi drug resistant tuberculosis (MDR-TB) thanks to World Health Organisation (WHO) for placing bedaquiline along with levofloxacin/moxifloxacin and linezolid in Group A reserved for prioritised medicines. Till now bedaquiline was placed under Group C which belonged to drugs used when patients become resistant to Group A and Group B drugs according to the earlier guidelines. WHO has also warned on safety issues and effectiveness of using bedaquiline on MDR-TB patients for over 6 months as it has not found any evidence yet.