Antihypertensive drug Zero, i.e. Cotrimoxazole Hydrochlorothiazide Tablets, may have side effects such as chest tightness, dizziness, drowsiness, panic, etc., and should be taken according to the doctor’s instructions. Cotrimoxazole Hydrochlorothiazide Tablets is a compound preparation, the main components of which are hydrochlorothiazide, reserpine, aminopterin and dihydralazine sulfate. In addition to dizziness, headache and other side effects, this product may inhibit the excitability of the sympathetic nervous system, making mood depression, slowing down the heartbeat; it may also increase uric acid and gastric acid secretion, which can be improved when the dosage is reduced or discontinued. Although the drug can be used to treat high blood pressure, but not all people with high blood pressure can be used, if you are allergic to the product, pregnant and lactating women, suffering from depression, active ulcers, ulcerative colitis, severe renal dysfunction can not use the drug. It is recommended to use this drug in accordance with medical advice, and pay attention to monitoring blood pressure and renal function.