<prompt> Which of the following is not a calcium channel blockersEnalaprilNifedipineVerapamilDiltiazem  <response>: Refer kDT 7e p562 Calcium channel blockers are prescription medications that relax blood vessels and increase the supply of blood and oxygen to the hea while also reducing the heas workload. Examples of calcium channel blockers include: Amlodipine Norvasc 