<prompt> Propranolol is useful in all exceptAtrial flutterParkinsonian tremorThyrotoxicosisHypertrophic cardiomyopathy  <response>: Ans. B Parkinsonian tremorRef: KDT 8the p164Propranolol is useful in the management of tremor due to overdose of sympathomimetic agents b2 mediated. Metoprolol as well as propranolol are effective in essential or familial tremor b1 mediated. b -blockers are ineffective in intention tremor and rest parkinsonian tremors. 