Medicine Name: Losar Beta-H Tablet. Composition: Losartan (50mg) + Atenolol (50mg) + Hydrochlorothiazide (12.5mg). Side Effects: Nausea Taste change Diarrhea Upset stomach Headache Dizziness Cold extremities Weakness Numbness of extremity Increased uric acid level in blood Increased blood lipid level Decreased magnesium level in blood Slow heart rate Decreased sodium level in blood Decreased blood pressure.