Generic Name: metoprolol, Oral tablet

Lopressor

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  • Lopressor
SECTION 1 of 5

Highlights for metoprolol

Oral tablet
1

Metoprolol can help prevent heart attack or heart damage after a heart attack.

2

Don't suddenly stop taking metoprolol. Stop gradually under a doctor’s supervision.

3

If you have asthma, diabetes, or poor circulation, tell your doctor before taking metoprolol.

4

This drug is available in many strengths and generic forms.

5

There are several drug interactions, so discuss all your medications with your doctor or pharmacist.

IMPORTANT INFORMATION

FDA Warning

Metoprolol has a black box warning. This is the most serious warning from the U.S. Food and Drug Administration (FDA). Though the medication can still be sold and used, a black box warning alerts doctors and patients to potentially dangerous problems.

Warning: Don’t stop taking metoprolol suddenly. If you do, you may experience worse chest pain, a jump in blood pressure, or even have a heart attack.

Stopping metoprolol is not recommended. If you need to stop taking the drug, first talk to your doctor. Your dose should be gradually decreased under a doctor's supervision.

Drug Features

Metoprolol is a prescription drug. It’s available in these forms: oral immediate-release tablet, oral extended-release tablet, and oral 24-hour release tablet.

Metoprolol may be taken in combination with hydrochlorothiazide or chlorthalidone.

Metoprolol is available in its generic form. Generic drugs may cost less but don't always come in the same strengths or forms as brand name drugs. Talk to your healthcare provider to see if the generic will work for you.

Why It's Used

Metoprolol is used to:

  • lower high blood pressure
  • reduce chest pain
  • after a heart attack, the medication reduces the amount of work your heart muscle has to do to push blood through your body.

How It Works

Metoprolol belongs to a class of drugs called beta blockers. A class of drugs refers to medications that work similarly in your body. They have a similar chemical structure and are often used to treat similar conditions.

More Details

How It Works

Metoprolol belongs to a class of drugs called beta blockers. A class of drugs refers to medications that work similarly in your body. They have a similar chemical structure and are often used to treat similar conditions.

Beta blockers prevent norepinephrine (adrenalin) from acting on beta receptors in blood vessels and in the heart. This causes blood vessels to relax. By relaxing the vessels, beta blockers help to lower blood pressure and reduce chest pain. Blood pressure is often raised because vessels are tightened. That puts a strain on the heart and increases the body's oxygen demand. Beta blockers help to lower the heart rate and the heart's demand for oxygen. 

Beta blockers don’t permanently change blood pressure and chest pain. Instead, they help to manage the symptoms.

SECTION 2 of 5

metoprolol Side Effects

Oral tablet

Most Common Side Effects

The most common side effects that occur with metoprolol include:

  • tiredness

  • dizziness

  • depression

  • diarrhea

  • shortness of breath

  • slower than normal heart rate (bradycardia)

  • reduced interest in sex

  • rash

Be careful about driving until you know how metoprolol will affect you.

Serious Side Effects

If you experience any of these serious side effects, call your doctor right away. If your symptoms are potentially life threatening, or if you think you’re experiencing a medical emergency, call 9-1-1.

  • excessively low blood pressure
  • poor circulation (cold or blue fingers or toes)
  • very slow heart rate
  • fatigue

  • serious depression

Pharmacist's Advice
Healthline Pharmacist Editorial Team

Metoprolol does not cause drowsiness.

  • Avoid standing quickly or moving your head suddenly. Metoprolol causes your blood vessels to widen. This causes your blood flow to slow down and not flow to your brain as quickly as normal. When blood isn't getting to your brain as quickly, these movements can make you dizzy.
  • Take your dose at the same time each day to keep the amount of metoprolol in your body the same each day. Taking it at different times each day changes the amount in your body from day to day. Fluctuations in the amount of drug in your body can change your blood pressure.
  • Avoid smoking or being around people who smoke. Smoke may make your lungs tighten, causing wheezing or shortness of breath.
Disclaimer: Our goal is to provide you with the most relevant and current information. However, because drugs affect each person differently, we cannot guarantee that this information includes all possible side effects. This information is not a substitute for medical advice. Always discuss possible side effects with a healthcare provider who knows your medical history.
SECTION 3 of 5

metoprolol May Interact with Other Medications

Oral tablet

Metoprolol can interact with other medications, herbs, or vitamins you might be taking. That’s why your doctor should manage all of your medications carefully. If you’re curious about how this drug might interact with something else you’re taking, talk to your doctor or pharmacist.

Note: You can reduce your chances of drug interactions by having all of your prescriptions filled at the same pharmacy. That way, a pharmacist can check for possible drug interactions.

Medications That Might Interact with This Drug

Mental Health Drugs

Reserpine and monamine oxidase (MAO) inhibitors may increase or add to the effects of metoprolol. They may also increase light-headedness or slow your heart rate more. MAO inhibitors can continue to interact with metoprolol for up to 14 days after taking them.

MAO inhibitors include:

  • isocarboxazid (Marplan)
  • phenelzine (Nardil)
  • selegiline (Emsam)
  • tranylcypromine (Parnate)

Heart Rhythm Drugs

These drugs can also interact with metoprolol. If you use digitalis (Lanoxin) with metoprolol, it could slow down your heart rate too much.

Calcium Channel Blockers

Like metoprolol, these drugs are used for hypertension and several other heart problems. Combined with metoprolol, calcium channel blockers may reduce the contraction of the heart and slow it down more. Doctors sometimes use this combination under close supervision.

These drugs include:

  • amlodipine (Norvasc)
  • diltiazem (Cardizem, Dilacor, Taztia, Tiazac)
  • felodipine
  • celvidipine
  • flunaraizine
  • isradipine
  • nicardipine
  • nifedipine
  • nimodipine
  • nisoldipine
  • verapamil

Drugs Processed in the Same Way as Metoprolol

Drugs used to treat depression and other mood disturbances are processed in the body by the same systems as metoprolol. So, combining them could also increase the levels of metoprolol in the body. These include:

  • fluoxetine (Prozac)
  • fluvoxamine (Luvox)
  • paroxetine (Paxil)
  • sertraline (Zoloft)
  • bupropion (Wellbutrin, Zyban)
  • clomipramine (Anafranil)
  • desipramine (Norpramin)
  • chlorpromazine
  • fluphenazine
  • haloperidol
  • thioridazine

Other drugs that are processed in the body the same way as metoprolol, include:

  • other heart rhythm drugs like quinidine and propafenone
  • the antiretroviral ritonavir (Norvir)
  • antihistamines, including diphenhydramine
  • antimalarials, such as hydroxychoroquine and quinidine
  • antifungals, such as terbinafine
  • the blood pressure drug hydralazine

These drugs can all increase the level of metoprolol in the body.

Alpha Blockers

Alpha blockers also lower blood pressure. They may decrease blood pressure too much when combined with metoprolol. Types include:

  • guanethidine
  • betanidine
  • reserpine
  • alpha-methyldopa
  • clonidine
  • prazosin

Clonidine must be carefully managed if it's combined with metoprolol. Stopping the drug suddenly while also taking metoprolol can cause a big jump in blood pressure. 

Ergot Alkaloids

Ergot Alkaloids, like Dihydroergotamine, interact with metoprolol. These drugs narrow blood vessels to treat headaches. If you take them at the same time as metoprolol, they may cause dangerous narrowing of blood vessels.

Dipyridamole

Dipyridamole, which is sometimes used in heart testing, can conflict with metoprolol.

Disclaimer: Our goal is to provide you with the most relevant and current information. However, because drugs interact differently in each person, we cannot guarantee that this information includes all possible interactions. This information is not a substitute for medical advice. Always speak with your healthcare provider about possible interactions with all prescription drugs, vitamins, herbs and supplements, and over-the-counter drugs that you are taking.

People with asthma or COPD

Generally, people with asthma or chronic obstructive pulmonary disease (COPD) shouldn’t take metoprolol. A doctor may still prescribe it, but only in small doses with careful monitoring. At higher doses, metoprolol can block different receptors on the breathing passages. This narrows the passages, worsening asthma or COPD.

People with diabetes

Metoprolol may eliminate tremors and increase heart rate, both of which are signs of low blood sugar. Without these signals, it becomes more difficult to recognize low blood sugar levels. 

People with poor circulation

If you have poor circulation in your feet and hands, it may become worse when taking metoprolol. Because metoprolol reduces blood pressure, you may get even less blood to these parts of your body.

Pregnant women

Metoprolol is a category C pregnancy drug. That means two things:

  1. Research in animals has shown adverse effects to the fetus when the mother takes the drug.
  2. There haven’t been enough studies done in humans.

If you’re pregnant and have high blood pressure, speak with your healthcare provider about your treatment options during pregnancy.

Women who are nursing

Metoprolol enters the breast milk and could be passed to your baby if you breastfeed while taking this drug. Talk to your healthcare provider before breastfeeding.

For Seniors

Seniors may need a smaller dose of metoprolol at first. The dose may then increase gradually.

For Children

Children aged 1–17 years may be treated with the immediate-release form of the drug.

When to call the doctor

Call your doctor if your blood pressure remains high or if you have chest pain that persists after taking your medication.

SECTION 4 of 5

How to Take metoprolol (Dosage)

Oral tablet

All possible dosages and forms may not be included here. Your dose, form, and how often you take it will depend on:

  • your age
  • the condition being treated
  • how severe your condition is
  • other medical conditions you have
  • how you react to the first dose

What Are You Taking This Medication For?

High blood pressure

Brand: Lopressor

Form: Immediate-release Oral Tablet
Strength: 50 mg and 100 mg
In generic form, metoprolol tartrate is available as tablets in strengths of: 25 mg, 50 mg, and 100 mg

Brand: Toprol XL

Form: Extended-release Oral Tablet
Strength: 25 mg, 50 mg, 100 mg, and 200 mg
The generic version of metoprolol succinate is available as tablets in the strengths of: 25 mg, 50 mg, 100 mg, and 200 mg
Adult Dosage (ages 18-64 years)
  • The immediate-release drug is often started at 50 mg, taken twice a day. It’s gradually adjusted if needed.
  • The extended-release drug is often started at 25 mg taken once a day or more. It’s also gradually increased if needed.
Child Dosage (ages 0-17 years)

Dosage for people younger than 18 years hasn’t been established.

Senior Dosage (ages 65 years and older)

Your body may process this drug more slowly. Your doctor may start you on a lowered dose so that too much of this drug does not build up in your body. Too much of the drug in your body can be toxic.

Special considerations

Liver Disease: Having liver disease may affect your dose. Speak with your healthcare provider.

Angina (chest pain)

Brand: Lopressor

Form: Immediate-release Oral Tablet
Strength: 50 mg and 100 mg
In generic form, metoprolol tartrate is available as tablets in strengths of: 25 mg, 50 mg, and 100 mg

Brand: Toprol XL

Form: Extended-release Oral Tablet
Strength: 25 mg, 50 mg, 100 mg, and 200 mg
The generic version of metoprolol succinate is available as tablets in the strengths of: 25 mg, 50 mg, 100 mg, and 200 mg
Adult Dosage (ages 18-64 years)
  • The immediate-release drug is often started at 50 mg, taken twice a day. It’s gradually increased as needed.
  • The extended-release is often started at 100 mg taken once a day. It’s gradually increased if needed.
Child Dosage (ages 0-17 years)

Dosage for people younger than 18 years hasn’t been established.

Senior Dosage (ages 65 years and older)

Your body may process this drug more slowly. Your doctor may start you on a lowered dose so that too much of this drug does not build up in your body. Too much of the drug in your body can be toxic.

Special considerations

Liver Disease: Having liver disease may affect your dose. Speak with your healthcare provider.

Heart failure or after a heart attack

Brand: Lopressor

Form: Immediate-release Oral Tablet
Strength: 50 mg and 100 mg
In generic form, metoprolol tartrate is available as tablets in strengths of: 25 mg, 50 mg, and 100 mg

Brand: Toprol XL

Form: Extended-release Oral Tablet
Strength: 25 mg, 50 mg, 100 mg, and 200 mg
The generic version of metoprolol succinate is available as tablets in the strengths of: 25 mg, 50 mg, 100 mg, and 200 mg
Adult Dosage (ages 18-64 years)
  • After heart attack or for patients with heart failure, the dose is highly individual. The oral drug is often started in the hospital.
  • The oral immediate-release tablet is often dosed at 12.5–25 mg, taken once a day to start. From there, the dose is slowly adjusted.
Child Dosage (ages 0-17 years)

Dosage for people younger than 18 years hasn’t been established.

Senior Dosage (ages 65 years and older)

Your body may process this drug more slowly. Your doctor may start you on a lowered dose so that too much of this drug does not build up in your body. Too much of the drug in your body can be toxic.

Special considerations

Liver Disease: Having liver disease may affect your dose. Speak with your healthcare provider.

Disclaimer: Our goal is to provide you with the most relevant and current information. However, because drugs affect each person differently, we cannot guarantee that this list includes all possible dosages. This information is not a substitute for medical advice. Always to speak with your doctor or pharmacist about dosages that are right for you.
Pharmacist's Advice
Healthline Pharmacist Editorial Team

Metoprolol comes with serious risks if you don’t take it as prescribed.

If You Don’t Take It

If you have high blood pressure or chest pain and don’t take your metoprolol, you risk:

  • increasing your blood pressure
  • damaging your blood vessels or main organs, such as your lungs, heart, or liver
  • increasing your risk of a heart attack

If You Stop Taking It Suddenly

If you suddenly stop taking metoprolol for high blood pressure, chest pain, or after a heart attack, you raise your risk of heart attack.

If You Don’t Take It on Schedule

Not taking metoprolol every day, skipping days, or taking doses at different times of day also come with risks. Your blood pressure might fluctuate too often. That might increase your risk for a heart attack.

If You Miss a Dose

If you miss a dose, just take the next dose as planned. Don’t double your dose.

Metoprolol can be used either as a short-term drug or a long-term drug.

Important Considerations for Taking Metoprolol

Take metoprolol with food

Take it either with a meal or right after. This drug may cause nausea. Taking it with food will allow your stomach to digest it better.

Don’t crush the 24-hour release tablet

However, you can cut the tablet along the score marks (the groove on the tablet) if your healthcare provider recommends a smaller dose.

Store at room temperature: 68–77°F (20–25°C)

Protect it from light, heat, and moisture. You may also store the drug briefly at temperatures as low as 59°F and as high as 86°F.

Note: Be careful of moist environments, including bathrooms. To keep drugs away from moisture, store them somewhere other than your bathroom and any other damp location.

What does the pill look like?

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How Much Does metoprolol Cost?

Oral tablet
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Content developed in collaboration with Susan J. Bliss, RPh, MBA

Medically reviewed by Stacey Boudreaux, PharmD and Alan Carter, PharmD on January 22, 2015

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Disclaimer: Healthline has made every effort to make certain that all information is factually correct, comprehensive, and up-to-date. However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional. You should always consult your doctor or other healthcare professional before taking any medication. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or all specific uses.

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