Which of the following is a potassium channel opener?: (A) Nicorandil, (B) Ranolazine, (C) Ivabradine, (D) Nitroprusside
Answer is A. Ans. (A) Nicorandil(Ref: Harrison 12th/1862)Nicorandil is the agent that causes coronary dilation by activating myocardial ATP sensitive K+ channels. Inaddition it possesses NO releasing property; to which tolerance does not develop.