Medicine Name: Olvance-CT 40 Tablet. Composition: Olmesartan Medoxomil (40mg) + Chlorthalidone (12.5mg). Side Effects: Nausea Taste change Diarrhea Upset stomach Weakness Headache Dizziness Increased blood uric acid Increased blood lipid level Electrolyte imbalance Glucose intolerance Decreased blood pressure.