Betalucil is generically known as metoprolol tartrate and Viagra is generically known as sildenafil, and usually these two medications should not be taken together. Metoprolol tartrate belongs to beta receptor antagonist, which is mainly used for the prevention and treatment of myocardial ischemia, supraventricular tachyarrhythmia and other diseases. Sildenafil is mainly used for the treatment of erectile dysfunction and other diseases in men, but after taking it may affect the cardiovascular system, angina, myocardial ischemia, cerebral thrombosis, heart failure and other discomforts. After the above drugs are taken together, the therapeutic effect of metoprolol tartrate may be affected due to the adverse effects of sildenafil, resulting in low blood pressure and other discomforts. Therefore, these two drugs should not be taken together. Metoprolol tartrate may cause fatigue, dizziness, headache, bradycardia and other discomforts, and is contraindicated in people with cardiogenic shock, decompensated cardiac insufficiency and atrioventricular block of degree II or III. In the process of using the drug also need to monitor the liver and kidney function, blood pressure, etc., and elderly patients, children and other special groups need to use the drug under the guidance of a doctor. Sildenafil, in addition to the cardiovascular system, may cause weakness, pain, chills, vomiting, edema and other discomforts. It is prohibited for those who are taking nitrate drugs and those who are allergic to the components of the drug. It should not be used in conjunction with other antihypertensive drugs to avoid enhancing the antihypertensive effect, thus resulting in hypotension. Elderly patients and other special groups need to use the drug under the guidance of a doctor. All of the above medications should be used under the guidance of a doctor, avoid self-medication, in order to avoid adverse consequences.