Lopressor (Metoprolol)

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Medically reviewed by Dr. Samuel Maaiah, PharmD

Last updated: April 10, 2024

Medically Reviewed by Pharmacist Samuel Maaiah, PharmD

Dr. Maaiah is a PharmD graduate who has practiced both in pharmaceutical consulting and retail pharmacy. His interests include consulting and the development and approval of new therapeutics. He currently works as a Medical Information Consultant (MIC) and as a retail pharmacist. As a MIC he helps pharmaceutical companies with projects and by consulting as a medical information expert.

When Dr. Maaiah is not working, he enjoys spending time with his family and friends, doing outdoor activities, working out, and reading.

Drug Information

Uses

Lopressor is a beta-blocker that is used to treat high blood pressure, angina, and myocardial infarctions.

Dosage

The tablets are available in different strengths:

  • 50 mg
  • 100 mg

Side Effects

The most common side effects of Lopressor include:

  • Hypotension
  • Bradycardia
  • Heart block
  • Heart failure

Speak with your doctor for a full list of side effects that apply to you if you are taking Lopressor.

Warnings & Precautions

Lopressor should be used cautiously in patients who have impaired liver function. 

Interactions

The most common drug interactions seen with Lopressor include:

  • Reserpine
  • Beta-blockers
  • Digoxin
  • Propafenone
  • Ritonavir
  • Diphenhydramine
  • Hydroxychloroquine
  • Terbinafine
  • Cimetidine

Speak with your doctor for more information and before starting a new medication with Lopressor. 

Storage

Store at room temperature (77ºF). Protect the Lopressor from moisture. 

Pharmacist Tips

  • Lopressor can be titrated to ensure that patients receive the correct dose.
  • Monitor patients for changes in blood pressure with changes in position, especially during the initiation of Lopressor and during dose increases
  • Lopressor should be used cautiously in patients with diabetes who are taking anti-diabetic medications.

The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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Metoprolol FAQ

Should I take Lopressor in the morning or at night?

Lopressor can be taken at any time of day, but should be taken at the same time every day. Because of the dizziness than can occur with Lopressor, it is sometimes recommended to take it at night to avoid this side effect.

What does Lopressor do for the heart?

Lopressor is a beta-blocker, and it works on the heart by slowing down the heart rate and lowering blood pressure. 

Why do you need to take metoprolol with food?

Metoprolol is taken with food to slow its absorption, and reduce the risk of side effects. 

Is 50 mg of Lopressor a lot?

The typical starting dose of Metoprolol is 50 mg, but this can be increased based on your response to the medication.

What is Lopressor used for?

Metoprolol is indicated for the treatment of high blood pressure, angina, and heart attacks. 

The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

FAQ