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Methods	Randomized controlled trial Duration: dates not described
Participants	Number: 18 enrolled infants Inclusion criteria: post‐BCG vaccine lymphadenitis Exclusion criteria: fluctuation of the adenitis
Interventions	Intervention group: isoniazid PO 10 mg/kg/day for a maximum of 9 months Control group: no intervention
Outcomes	Clinical failure (abscess formation/lymph node size increased)
Notes	Location: Dominica, West Indies Setting: not described Source of funding: not described
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not described in the study
Allocation concealment (selection bias)	Unclear risk	Not described in the study
Blinding of participants and personnel (performance bias) All outcomes	High risk	Not performed, open study
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not described
Incomplete outcome data (attrition bias) All outcomes	Low risk	No patients were lost to follow‐up
Selective reporting (reporting bias)	Unclear risk	Insufficient information to permit judgement
Other bias	Unclear risk	There was insufficient information to assess whether an important risk of bias exists