After taking antihypertensive drugs, blood glucose will rise, if it is the elevation caused by drugs, not eating can be lowered; but if it is not the elevation caused by drugs, not eating will not be lowered. In general, antihypertensive drugs will not affect the blood sugar changes, may be some metoprolol or thiazide drugs will affect the function of the pancreatic islets, so that the blood glucose appears to rise, but this rise is generally relatively small, and will not cause too great an impact, generally can be recovered on their own, and do not need to stop the drug. However, if the blood sugar rise is relatively large, it is not drug-induced changes, may be diet, mood and other fluctuations caused by obesity, abnormal pancreatic islet function, diabetes and other causes of elevated blood glucose, this time, even if the withdrawal of antihypertensive drugs is also no effect. It is recommended that patients regularly monitor blood glucose, when the exclusion of physiological factors, timely medical examination, do not blindly discontinue medication to avoid causing an increase in blood pressure.