This diverse group of drugs can be divided into the following groups:

1. Direct acting vasodilators
   • Nitrates: Glyceryl trinitrate, Isosorbide Mononitrate, Isosorbide Dinitrate
   • Nitroprusside
   • Hydralazine
   • Diazoxide
   • Minoxidil
2. Alpha Antagonists
   • Centrally acting: Clonidine (discussed separately), Methyl dopa
   • Peripheral Non-selective: Phentolamine, Phenoxybenzamine
   • Peripheral Selective: Prazosin, Terazosin
3. Angiotensin acting
   • Angiotensin Converting Enzyme Inhibitors
   • Angiotensin II Receptor Inhibitors: Candesartan, Eprosartan, Irbesartan, Losartan, Telmisartan
4. Calcium Channel Blockers (discussed separately)

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