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QT prolongation is a condition in which repolarization of the heart after a heartbeat is affected. 

It results in an increased risk of an irregular heartbeat which can result in shortness of breath or chest pain, fainting, seizures or cardiac arrest. 

If patients experience such signs or symptoms, health workers need to refer such patients to the nearest health facility where Electrocardiogram (ECG) can be done and further management initiated.

Replacement of component(s) drug(s) is required in conditions like adverse drug reaction, poor tolerance, contraindication and resistance detected on baseline Liquid Culture (LC) Drug Susceptibility Testing (DST). 

The replacement sequence of drugs is prepared according to their efficacy, no demonstrable resistance, prior use, side-effect profile and background resistance to replacement drug in the country.

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Delamanid (Dlm) can be provided to adults and children aged 2 years to <18 years, given their special needs in consultation with a paediatrician.​ Special considerations while using Dlm include:

The total duration of a longer oral Multidrug/ Extensively drug-resistant TB (M/XDR-TB) regimen is 18–20 months. ​

There is a high baseline incidence of depression and anxiety in patients with Multidrug-resistant (MDR)/ Extensively Drug-resistant TB (XDR-TB) patients. Special precautions need to be taken for M/XDR-TB treatment-initiated patients suffering from pre-existing psychiatric illnesses.

Drugs Associated with Psychosis: Cycloserine (Cs), High-dose Isoniazid (H^h), Fluoroquinolone (FQ) and Ethionamide (Eto) 

The treating physician should elicit the history of past or present seizure disorders in all Drug-resistant TB (DR-TB) patients.​

If the seizures are not under control, initiation or adjustment of anti-seizure medications will be needed before the start of DR-TB treatment. ​In addition, if other underlying conditions or causes for seizures exist, they should be corrected.​

In Drug-resistant TB (DR-TB) patients with localized disease, surgery, as an adjunct to chemotherapy, can improve outcomes; provided that skilled thoracic surgeons and excellent postoperative care is available.​

A patient with a unilateral resectable disease may be considered for surgery if there is: ​

All women of childbearing age who are awaiting results of the Culture and Drug Susceptibility Test (C&DST), as well as those receiving Drug-resistant TB (DR-TB) treatment, should be advised and counselled intensively to use birth control measures because of the potential risk to both the mother and the foetus.​

The principles for the treatment and monitoring of Multidrug-resistant (MDR)/ Rifampicin-resistant TB (RR-TB) in children are quite similar to adults and use the same second-line drugs. 

Principles 

Apart from clinical evaluation, the patients need to be closely assessed by various laboratory parameters to monitor the improvement on treatment, drug-induced adverse events or co-morbidities to enable timely interventions to address these and improve the probability of treatment success, survival and quality of life.