Contraindications of beta blockers are
Ref:KD Tripathi pharmacology 7th edition (page.no: 146) the beta blocker is contraindicated in asthma because of beta 2 blocking effect (beta 2 agonist cause bronchodilation). Uses of beta blockers are Hypeension, Myocardial infarction, Pheochromocytoma, Cardiac arrhythmias, Thyrotoxicosis, MIGRAINE, essential tremors etc
Asthma
Myocardial infarction
Hypeension
Arrhythmia
Autonomic nervous system