CommonSide Effects of Widrot M are Nausea, Vomiting, Diarrhea, Dryness in mouth, Heartburn, Vertigo, Insomnia (difficulty in sleeping), Hypotension (low blood pressure), Fast heart rate, Sweating, Constipation, Increased liver enzymes, Increased white blood cell count (eosinophils), Decreased white blood cell count (lymphocytes), Low blood platelets, Purpura, Agranulocytosis (deficiency of granulocytes in the blood), Breathlessness, Ringing in ear, Abdominal pain, Flatulence, Indigestion, Stomach inflammation, Confusion, Depression.