What Is Lopressor: How Metoprolol (Also called Lopressor) Works and Its Side Effects

Metoprolol Lopressor Uses Dosage Side Effects

Lopressor is a heart medication used to treat hypertension, angina pectoris or chest pain, glaucoma, migraines, ventricular arrhythmias and to prevent miocardial infarction or heart attacks. It is classified pharmacologically as a beta blocker. It also falls under the classification of antianginal and antihypertensive.

Lopressor is a heart medication – image by emedz.net

Other beta blockers are:

  • atenolol or tenormin
  • carvedilol or coreg
  • propranolol or inderal LA
  • acebutolol or sectral
There are many kinds of beta blockers – image by clevelandclinic.org

How Lopressor Works

The heart contains beta1 adrenergic receptors. These receptors stimulate the heart to beat faster and increase blood pressure when they are stimulated. Beta blockers like lopressor block stimulation of these cells and in the process reduce blood pressure and the rate at which the heart beats.

Lopressor does not usually affect parts of the body that have beta2 adrenergic receptors like the lungs and uterus.

Before Taking Lopressor

Some people should not take lopressor if they suffer from certain diseases such as:

  • uncompensated congestive heart failure
  • pulmonary edema
  • shock originating from the heart or cardiogenic shock
  • low heart rate
People with low heart rate should not take lopressor – image by medicalnewstoday.com

People who have respiratory diseases like asthma should take lopressor with caution because at higher doses, it may affect the beta2 receptors in the lungs and cause constriction of the airways making it difficult for the person to breathe. Kidney and liver problems may require that a person take this medication with caution.

People who have respiratory diseases like asthma should take lopressor with caution – image by researchgate.net

Lopressor may interact with other drugs in the following ways:

  • low heart rate may occur when lopressor is taken with digoxin
  • low blood pressure may occur when lopressor is taken with other antihypertensive medications
  • lopressor may change the efficacy of insulins or oral hypoglycemic drugs

Side Effects of Lopressor

Lopressor has side effects, be careful – image by myhealthyclick.com

Some side effects of lopressor are:

  • dizziness
  • fatigue
  • depression
  • drowsiness
  • nausea
  • vomiting
  • constipation
  • diarrhea
Some side effects of lopressor – image by verywellhealth.com
  • heartburn
  • dry mouth
  • flatulence
  • stuffy nose
  • stomach ache or pain

Adverse effects of lopressor are severe effects that need to be reported to a physician immediately.

Some of them are:

image by pinterest.com
  • wheezing
  • difficulty breathing
  • fainting
  • rapid heart beats
  • irregular heart beats

Teaching/ Nursing Interventions

The registered nurse teaches the patient with a prescription for lopressor the following:

  • not to stop taking the medication abruptly
  • how to check blood pressure, pulse and the importance reporting any changes from the normal to a health care provider
Not to stop taking the medication abruptly – image by mediprint.com
  • to avoid driving or activities that need alertness until they know how the medication will affect their mental status since lopressor may cause drowsiness
  • to get up from a lying or sitting position slowly to avoid falls due to dizziness
  • to consult a physician before taking any over the counter medication
  • to closely monitor blood sugar levels if the patient is diabetic
Monitor blood sugar levels – image by healthhub.sg
  • to report any adverse effects of lopressor to a physician along with any bothersome or severe side effects

When taking any medication such as lopressor, it is important to comply with whatever advice a health care provider gives in order to remain in good health. Therefore when taking lopressor or any other medication, it is necessary to express any concerns about the medication to a healthcare provider.


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