Pharmacology General 2bdf0281 The Nitrate which does not undergo first pass metabolism is - A Isosorbide mononitrate B Nitroglycerine C Pentaerythritol tetranitrate D Isosorbide dinitrate High-Yield Explanation Ans. is 'a' i.e., Isosorbide mononitrate o "All nitrates except isosorbide mononitrate undergo extensive but variable first pass metabolism in liver".