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Generic Lopressor (Metoprolol) is in a class of drugs called beta-blockers. Beta-blockers affect the heart and circulatory system.

This medicine is used to treat high blood pressure and angina pectoris (chest pain). It is also used after a heart attack to improve survival. Controlling high blood pressure helps prevent strokes, heart attacks, and kidney problems. This medicine may also be used to treat other conditions as determined by your doctor.

Active Ingredients: metoprolol.
Other Ingredients: Tablets contain cellulose compounds, colloidal silicon dioxide, D&C red no. 30 aluminum lake (50-mg tablets), FD&C blue no. 2 aluminum lake (100-mg tablets), lactose, magnesium stearate, polyethylene glycol, propylene glycol, povidone, sodium starch glycolate, talc, and titanium dioxide.
Class and Mechanism: Metoprolol is a beta-adrenergic blocking agent. Metoprolol blocks the action of the sympathetic nervous system, a portion of the involuntary nervous system. The sympathetic nervous system stimulates the pace of the heartbeat. By blocking the action of these nerves, Generic Lopressor (Metoprolol) reduces the heart rate and is useful in treating abnormally rapid heart rhythms. Metoprolol also reduces the force of heart muscle contraction and lowers blood pressure. By reducing the heart rate and the force of muscle contraction, Metoprolol reduces heart muscle oxygen demand. Since angina occurs when oxygen demand of the heart exceeds supply, Metoprolol is helpful in treating angina.

Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.

Take this medication by mouth, with or right after a meal, as directed by your doctor. Use this medication regularly in order to get the most benefit from it. To help you remember, use it at the same time(s) each day. This drug is not effective if you use it only when chest pain or a migraine headache occurs. It is very important to take this medication regularly as prescribed to help prevent these conditions. The dosage is based on your medical condition and response to therapy. It may take one or two weeks before the full benefit of this drug takes effect. It is important to continue taking this medication even if you feel well. Most people with high blood pressure do not feel sick. Do not suddenly stop taking this medication without consulting your doctor. Your condition may become worse when the drug is suddenly stopped.
If OVERDOSE: If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include very slow heart rate, severe dizziness, fainting, weakness, and difficult or slowed breathing.

Take the missed dose as soon as you remember. If it is almost time for the next dose however, skip the missed dose and take only the next regularly scheduled dose. Do not take a double dose of this medication.

Do not take this medicine if you are taking Mibefradil. Use of this medicine is not recommended if you have a history of heart block. Contact your doctor or pharmacist if you have any questions or concerns about using this medicine.

Before taking Generic Lopressor (Metoprolol)
• tell your doctor and pharmacist if you are allergic to metoprolol or any other medications.
• tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking. Be sure to mention any of the following: fluoxetine (Prozac, Sarafem); paroxetine (Paxil); propafenone (Rythmol); quinidine (Quinidex); and reserpine (Serpalan, Serpasil, Serpatab). Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
• tell your doctor if you have or have ever had asthma or other lung disease; a slow heart rate; heart or liver disease; diabetes; or an overactive thyroid gland (hyperthyroidism).
• if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking metoprolol.
• you should know that metoprolol may make you drowsy. Do not drive a car or operate machinery until you know how this medication affects you.
• remember that alcohol can add to the drowsiness caused by this medication.
• you should know that if you have allergic reactions to different substances, your reactions may be worse while you are using metoprolol, and your allergic reactions may not respond to the usual doses of injectable epinephrine.
• tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking Metoprolol, call your doctor.

Generic Lopressor (Metoprolol) is generally well tolerated, side effects are mild and transient. Rare side effects include abdominal cramps, diarrhea, constipation, fatigue, insomnia, nausea, depression, dreaming, memory loss, fever, impotence, lightheadedness, slow heart rate, low blood pressure, cold extremities, sore throat, and shortness of breath or wheezing.

Tell your doctor of all nonprescription and prescription medication you are using, especially : a heart medication such as nifedipine (Procardia, Adalat), reserpine (Serpasil), verapamil (Calan, Verelan, Isoptin), diltiazem (Cardizem, Dilacor XR), clonidine (Catapres), digoxin (Lanoxin), doxazosin (Cardura), guanadrel (Hylorel), prazosin (Minipress), or terazosin (Hytrin), a diabetes medication such as insulin, glyburide (Diabeta, Micronase, Glynase), glipizide (Glucotrol), chlorpropamide (Diabinese), or metformin (Glucophage), a nonsteroidal anti-inflammatory drug (NSAID) such as ibuprofen (Motrin, Advil, others), naproxen (Aleve, Anaprox, Naprosyn, others), ketoprofen (Orudis, Orudis KT, Oruvail), and others, a respiratory medication such as albuterol (Ventolin, Proventil, Volmax, others), bitolterol (Tornalate), metaproterenol (Alupent, Metaprel), pirbuterol (Maxair), terbutaline (Brethaire, Brethine, Bricanyl), or theophylline (Theo-Dur, Theochron, Theolair, others), and others, the stomach medication cimetidine (Tagamet, Tagamet HB), or prescription or over-the-counter cough medicines, cold medicines, or diet pills. Drugs other than those listed here may also interact with Lopressor.
Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines.

Keep all appointments with your doctor. Your blood pressure should be checked regularly to determine your response to metoprolol. Your doctor may ask you to check your pulse (heart rate). Ask your pharmacist or doctor to teach you how to take your pulse. If your pulse is faster or slower than it should be, call your doctor.
Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.