Chodosh 1988.

Methods	Single‐dose Cross‐over Double‐blind Dropout: 11% prior to study beginning
Participants	n = 16 Mean age = 39 Inclusion: normotensive patients with stable bronchial asthma, > 15% increase FEV1 and FEV1 60% to 90% predicted Exclusion: taking cromolyn, their steroid or inhaler use changed, recent asthma attack requiring Tx , upper respiratory infection within 2 weeks or recent status asthmaticus
Interventions	#1: Metoprolol 200 mg Placebo #2: Inhaled isoproterenol after Tx and placebo
Outcomes	FEV1 Symptoms
Notes	Nonselective studied: dilevalol