Diltiazem can should refer to diltiazem hydrochloride and bethanechol should refer to metoprolol tartrate tablets. Diltiazem hydrochloride and metoprolol tartrate tablets can be taken together, but should be used under medical supervision. Diltiazem hydrochloride is a calcium blocker, while Betaloc is a beta blocker, and these two medications are different so they can be taken at the same time. These two drugs can be combined to treat patients suffering from angina pectoris and high blood pressure. Diltiazem Hydrochloride is a vasoprotective agent and is indicated for the prophylactic treatment of stable angina pectoris and the treatment of hypertension. Metoprolol tartrate tablets is a selective beta 1 receptor blocker, with the effect of lowering heart rate, blood pressure and cardiac output, suitable for the treatment of hypertension, angina pectoris and arrhythmia. It should be noted that the use of diltiazem hydrochloride is prohibited for those who are allergic to diltiazem hydrochloride, those with sinus node dysfunction, those with left ventricular insufficiency with pulmonary stasis, and those with low blood pressure, and patients who take diltiazem hydrochloride may experience symptomatic sinus bradycardia, sinoatrial block, and atrioventricular block, and other adverse reactions. And the use of metoprolol tartrate tablets is prohibited for those who are allergic to metoprolol tartrate tablets or other beta-blockers, those who are in cardiogenic shock, and those who have sick sinus node syndrome, and patients may experience adverse reactions such as fatigue, headache and dizziness after taking the tablets. It is recommended that patients should use diltiazem hydrochloride and metoprolol tartrate tablets under the guidance of a doctor, do not use them without authorization to avoid delay. Moreover, both drugs have the effect of slowing down the heart rate, so patients should monitor their heart rate regularly while taking the drugs.