Lopressor is is one of the beta-blockers. The main target of it is to fight tremors, hypertension, angina, heart rhythm problems. Lopressor also prevents migraine headache, heart attack. It may also be useful for other health problems, which are not described here. If you have an allergy to Lopressor or to some components it consists of don’t use it. If you have an allergy on some drugs related to it you should also avoid using of it. You should be careful in using of Lopressor if you have a thyroid disorder, depression, Raynaud's syndrome, liver disease, kidney problems, pheochromocytoma, sick sinus syndrome, heart failure, low blood pressure, bronchitis, diabetes, emphysema, Wolff-Parkinson-White syndrome, low blood sugar, Down syndrome and others. You may use this medicine alone or in complex with others drugs. But it’s strongly recommended to not use it with prescription and nonprescription drugs, dietary medicine, herbal drugs, mibefradil. It’s strongly reccomended to not use this medicine in the case of pregnancy. It can harm your unborn baby. You should also ask your doctor if this medicine could be compound with other drugs you are taking. You should have consultancy with your doctor before using Lopressor to prevent negative effects.