Hydrochlorothiazide Oral belongs to the class of Diuretics. Like all diuretics, Hydrochlorothiazide Oral eliminates water from body in the form of urine. This drug is used to treat edema and high blood pressure. These conditions often occur as a result of liver cirrhosis, cardiac arrest, kidney disorders and use of corticosteroids. The side effects of Hydrochlorothiazide Oral include - Low blood pressure - Headache - Weakness - Dizziness - Muscle cramps - Pins-and-needle sensation in hands and feet - Erectile Dysfunction (ED) - Mouth sores - Excessive thirst - Arrhythmia - Swelling in ankles - Visual problems Hydrochlorothiazide Oral interacts with the following drugs. - Lithium - Cholesterol-reducing drugs e.g. Cholestyramine, Colestipol - Diabetic drugs e.g. Metformin, Glimepiride - NSAIDs e.g. Ibuprofen, Naproxen - Narcotics e.g. Morphine, Codeine - Corticosteroids e.g. Prednisone, Methylprednisone - Beta-blockers e.g. Metoprolol, Atenolol - Barbiturates e.g. Phenobarbital, Pentobarbital