<prompt> The only reliable symptom of hypoglycemia in a patient on beta blocker therapy isTremorSweatingTachycardiaPalpitations  <response>: All the symptoms of hypoglycemia are blocked by beta blockers except sweating as it has cholinergic innervation Beta blockers non selective are contraindicated in : ABSOLUTE CI Pheochromocytoma Decompensated hea failure symptomatic bradycardia AV block Asthma RELATIVE CI Peripheral vascular disease 