Toprol XL (Metoprolol Succinate)

Toprol-XL (metoprolol succinate) is a medication used to treat high blood pressure, chest pain, and heart failure. It works by slowing the heart rate and lowering blood pressure, which reduces the workload on the heart. It’s an extended-release form of metoprolol that releases the medicine gradually throughout the day. It’s used regularly to help lower the risk of heart attacks and strokes and reduce hospital visits related to heart failure.

Directions

Toprol XL is taken by mouth as an extended-release tablet, typically once daily with or immediately after a meal. The starting dose varies depending on the condition being treated. For high blood pressure, the dosage may start at 25 mg to 100 mg once daily, while heart failure treatment often starts at 12.5 or 25 mg once daily. The dose can be gradually increased at weekly or longer intervals based on how a person responds to treatment.

Ingredients

The active ingredient in Toprol XL is metoprolol succinate.

Cautions

Before using this medication, you may want to consult a healthcare provider about the following:

• Any existing health conditions
• Any allergies
• A list of all medications currently being taken

Toprol XL should not be stopped suddenly, because abruptly stopping beta-blockers can worsen chest pain and, in some cases, trigger a heart attack, even in people taking it only for high blood pressure. The dose should be lowered gradually under medical supervision.

Heart failure symptoms can temporarily worsen when the dose is being increased, and adjustments such as adding or increasing diuretics may be needed before continuing dose increases.

People with asthma or other breathing conditions generally should avoid beta-blockers, but Toprol XL may be used with caution at the lowest effective dose if other treatments are not tolerated, with rescue inhalers readily available.

Toprol XL can slow the heart rate too much, which may lead to dizziness, fainting, or heart rhythm problems, especially in people with existing heart problems or those taking other heart-slowing medications.

In people with pheochromocytoma, Toprol XL should only be used after starting an alpha-blocker, since using it alone can dangerously raise blood pressure.

Starting high doses of Toprol XL right before non-cardiac surgery is not recommended, as it may increase the risk of low heart rate, low blood pressure, stroke, or death, though long-term therapy is usually continued through surgery.

Toprol XL can hide early warning signs of low blood sugar, such as a fast heartbeat, which increases the risk of severe or prolonged hypoglycemia, especially in people with diabetes, children, or those who are not eating regularly.

Signs of an overactive thyroid, like a rapid heart rate, may be masked while taking Toprol XL, and stopping it suddenly can trigger a serious thyroid emergency.

Symptoms of poor circulation in the arms or legs, such as pain or coldness, may worsen in people with peripheral vascular disease.

People with a history of severe allergic reactions may have stronger reactions while taking Toprol XL and may not respond as well to standard doses of epinephrine during an allergic emergency.

Avoid taking or using this medication if any of the following apply:

Contraindications

• Known hypersensitivity to metoprolol succinate, any component of the product, or other beta-blockers
• Severe bradycardia (abnormally slow heart rate)
• Heart block greater than first degree (a condition where electrical signals between the heart's chambers are impaired)
• Cardiogenic shock (a condition where the heart can’t pump enough blood to meet the body’s needs)
• Decompensated cardiac failure (severe heart failure where symptoms worsen despite treatment)
• Sick sinus syndrome (a heart rhythm disorder) unless a permanent pacemaker is in place
• Severe peripheral arterial circulatory disorders (conditions affecting blood flow to the limbs)

Side Effects

Common side effects of Toprol XL include:

• Tiredness or fatigue
• Dizziness or lightheadedness
• Slow heart rate (bradycardia)
• Shortness of breath
• Diarrhea or upset stomach
• Rash or skin reactions

More serious side effects can include worsening chest pain, heart attack, worsening heart failure, or worsening heart block, particularly if Toprol XL is stopped suddenly.

Low blood pressure, fainting, breathing problems such as wheezing, and stroke have also been reported in rare cases.

Contact a healthcare provider if you experience fainting, severe dizziness, worsening shortness of breath, swelling, chest pain, or unusual changes in mood or awareness.