Propranolol is contraindicated in diabetes mellitus because it
Ref; KD Tripathi pharmacology 7th edition (page no; 146) Propranolol delays recovery from hypoglycemia due to insulin and oral antidiabetics. It masks the warning signs of hypoglycaemia mediated through sympathetic stimulation (tachycardia, tremor).
Causes hyperglycemia
uses seizures
Masks the hypoglycemic symptoms
Causes hypotension
Autonomic nervous system