<prompt> Aeriolar dilators used in the treatment of CHFHydralazineNifedipinePrazosinEnalaprin  <response>: Nifedipine is a calcium channel blocker. Enalapril is an ACE inhibitor. Prazosin is alpha 1 blocker. Hydralazine is an aerial dilator and potassium channel opener REF.Essentials of medical pharmacology KD TRIPATHI 8 Edition 