<prompt> All are true about staing of beta-blocker therapy in a patient with congestive hea failure except:They should be staed with optimum dosesThey should be gradually increased over weeksSpecial precautions should be taken in cases of NYHA class 3 and 4Carvedilol and metoprolol are the preferred drugs  <response>: Ref: good man and gilman, 11e p1336 Clinical use of beta adrenergic receptor antagonistsin hea failure 