Lopressor SR (Metoprolol Tartrate Sr)

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Lopressor SR Brand
Dosage Quantity & Price
Metoprolol Tartrate Sr (Generic alternate to Lopressor SR) Generic
Dosage Quantity & Price
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Table of contents:

Lopressor SR is a medication used to treat high blood pressure and prevent the symptoms of angina pectoris (chest pain). It contains the active ingredient metoprolol and belongs to the class of medications called beta-blockers. Beta-blockers work by blocking the effect of the hormone adrenaline, also known as epinephrine. This causes the heart to beat more slowly and with less force, which can help to lower blood pressure and reduce the workload on the heart.

Lopressor SR tablets are designed to be slowly but almost completely absorbed into the gastrointestinal tract. Additionally, Metoprolol Tartrate may also help to improve blood flow by reducing the constriction of blood vessels.

Use and Dosage

Metoprolol Tartrate SR comes in the form Sustained Release Tablet, which is typically taken by mouth once daily, with or without food. The extended-release tablets should be swallowed whole and should not be crushed, chewed, or split. Avoid abrupt discontinuation of the medication, as this can cause rebound hypertension and other adverse effects.

The recommended dosage for Metoprolol Tartrate SR varies depending on the individual and the condition being treated. However, the usual dosages for Metoprolol Tartrate IR can range from 100-450 mg per day for hypertension, depending on the individual's blood pressure and response to treatment. Any questions or concerns about dosages of Metoprolol Tartrate SR should be discussed with a healthcare professional.

Take exactly as prescribed by your doctor. If you miss a dose, take it as soon as possible and continue with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you are not sure what to do after missing a dose, contact your doctor or pharmacist for advice.

Side Effects

Common Side Effects of Lopressor SR (Metoprolol Tartrate SR):

  • Abdominal pain or discomfort
  • Changes in sexual desire or ability
  • Constipation
  • Diarrhea
  • Dizziness or lightheadedness when rising from a sitting or lying position
  • Dry mouth
  • Fatigue
  • Hair loss
  • Headache
  • Increased sensitivity to sunlight
  • Increased sweating
  • Nausea
  • Trouble sleeping
  • Unusual tiredness or weakness with activity
  • Vivid dreams
  • Vomiting
  • Weight gain

Serious Side Effects of Lopressor SR (Metoprolol Tartrate SR):

  • Ankle swelling
  • Back or joint pain
  • Bleeding gums or cuts that don’t stop bleeding
  • Blood in urine
  • Blurred vision
  • Breathing difficulty or wheezing
  • Bruising
  • Changes in hearing
  • Changes in sleep
  • Changes in weight
  • Chest pain
  • Cold hands and feet
  • Coughing blood
  • Dark urine
  • Decreased interest in activities
  • Decreased urine production
  • Difficulty breathing
  • Dizziness
  • Dry or irritated eyes
  • Eye pain
  • Fatigue
  • Fingers or toes cold to touch, painful, or discolored
  • Hallucinations (hearing or seeing things that aren't there)
  • Headache
  • Hearing changes
  • Increased need to urinate
  • Irregular heartbeat or pulse
  • Loss of appetite
  • Lower back pain
  • Nausea
  • Numbness or tingling sensation in the extremities
  • Pale stools
  • Poor concentration
  • Skin rash
  • Slow heartbeat (especially less than 40 beats per minute)
  • Swelling of feet, ankles, or lower legs
  • Thoughts of suicide
  • Tiredness with activity
  • Unusual nosebleeds
  • Weight loss
  • Yellowing of the skin or whites of the eyes

Forms and Strength

Lopressor SR (Metoprolol Tartrate SR) is available in the following forms and strength:

Metoprolol Tartrate SR: Sustained Release Tablet

  • 100 mg
  • 200 mg


  • Bradycardia (slow heart rate): Lopressor SR can cause bradycardia, which may be more likely in patients with pre-existing heart conditions or those who are taking other medications that slow down the heart rate.
  • Hypotension (low blood pressure): Metoprolol Tartrate can cause hypotension, especially in patients with pre-existing low blood pressure or those who are taking other medications that lower blood pressure.
  • Respiratory problems: Lopressor SR can exacerbate respiratory problems in patients with asthma or other respiratory conditions.
  • Diabetes: Metoprolol Tartrate can mask the symptoms of low blood sugar in patients with diabetes.
  • Thyroid problems: Lopressor SR can mask the symptoms of hyperthyroidism in patients with thyroid problems.
  • Renal impairment: Lopressor SR should be used with caution in patients with renal impairment, as it may accumulate in the body and cause adverse effects.
  • Allergic reactions: Metoprolol Tartrate can cause allergic reactions, especially in patients who are hypersensitive to beta-blockers.
  • Depression and other psychiatric symptoms: Metoprolol Tartrate has been associated with depression and other psychiatric symptoms, including confusion, hallucinations, and nightmares.
  • Peripheral vascular disease: Metoprolol Tartrate should be used with caution in patients with peripheral vascular disease, as it may worsen symptoms.
  • Pregnancy and breastfeeding: Metoprolol Tartrate is not recommended for use during pregnancy or breastfeeding, as its safety has not been established in these populations.
  • Metoprolol Tartrate should not be stopped abruptly, as this can cause rebound hypertension and other adverse effects. Follow the dosing instructions provided by a healthcare professional and discuss any plans to discontinue the medication.

Frequently Asked Questions (FAQ)

Can Lopressor SR cause weight gain?

Weight gain is a possible side effect of Lopressor SR, although it is not common.

Can Metoprolol Tartrate be taken with food?

Metoprolol Tartrate can be taken with or without food, although it may be more effective when taken on an empty stomach.

How long does it take for Lopressor SR to start working?

The onset of action of Lopressor SR varies depending on the individual and the condition being treated. It can take several days or weeks for the full effects of the medication to be seen.

Can Metoprolol Tartrate be crushed or split?

Metoprolol Tartrate should not be crushed or split, as this can affect its extended-release properties.

Can Lopressor SR be used in children?

Lopressor SR is not recommended for use in children, as its safety and effectiveness in this population have not been established.

Can Lopressor SR be used in older adults?

Lopressor SR can be used in older adults, although the dosage may need to be adjusted due to age-related changes in metabolism and kidney function.


It's important to purchase Lopressor SR from verified Canadian pharmacy.

Additional information

Generic name:

Metoprolol Tartrate SR, Metoprolol Tartrate Sr


ER Tablet, Sustained Release Tablet


100mg, 200mg

Quantities Available:

84, 100