<prompt> A patient has a frequent tendency of migraine attacks. Which of the following drug should be given as prophylaxis?PropranololPindololErgotamineAll of the above  <response>: Prophylaxis of migraine is required if the attacks are frequent 2-3 per month. The drugs useful for prophylaxis are: Propranolol is the most commonly used drug for prophylaxis of migraine attacks.Timolol, atenolol, metoprolol and nadolol can also be used but the drugs with ISA e.g. pindolol are ineffective. 