Pancu 2003.

Methods	Randomised double‐blind placebo controlled trial Study conducted in USA, ANOVA across and within group
Participants	27 healthy volunteers, 9 subjects in each of the 3 study groups
Interventions	Nebulised albuterol 10 mg over 30 minutes versus Nebulised levalbuterol 2.5 mg over 30 minutes, versus Nornal saline in equivalent volumes
Outcomes	Serum potassium
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment (selection bias)	Unclear risk	B ‐ Unclear