<prompt> Drugs which increases nitric oxide are all except?Glycerine trinitrateHydralazineSodium nitroprussideFenoldopam  <response>: Ans. is d i.e., Fenoldopam o NO donors, which release NO are used to elicit smooth muscle relaxation. Drugs are - 1. Organic nitrates nitroglycerine 3. Sodium nitroprusside 5. Nebivolol 2. Organic nitrites Isoamylnitrite 4. Hydralazine 