Nitrenolol Tablets can be used to treat high blood pressure, which can cause adverse reactions such as dizziness, headache, chest tightness and fatigue. Nitrenolol Tablets is a compound preparation, the main ingredients are nitrendipine, atenolol, can be used for the treatment of mild to moderate essential hypertension; can cause dizziness, headache, facial flushing, palpitations, lower limb swelling, eye discomfort, constipation, chest tightness, coldness of the limbs, excessive dreaming and other adverse reactions, and occasionally can be seen in sexual dysfunction. Heart rate less than 60 beats / minute use with caution; pregnant women, lactating women use with caution; sick sinus syndrome, atrioventricular block, cardiac insufficiency and asthma patients are prohibited; the elderly should start with a small dose, to avoid inducing or aggravating the body circulation hypotension, increase angina pectoris, heart failure. It is recommended to use nizunolol tablets under the guidance of a doctor, not blindly self-medication.