Colesevelam

Cholesterol Reduction

Colesevelam is prescribed to reduce elevated low-density lipoprotein (LDL) cholesterol, often referred to as "bad" cholesterol. It is used as an addition to diet and exercise in the following populations:

• Adults with primary hyperlipidemia (high blood cholesterol).
• Children and teenagers ages 10 to 17 with heterozygous familial hypercholesterolemia, a genetic condition that causes high cholesterol.

This medication may be used alone or in combination with other cholesterol-lowering treatments, such as statins.

Type 2 Diabetes Management

Colesevelam is also used to improve glycemic (blood sugar) control in adults with type 2 diabetes mellitus. It is intended to be used alongside a proper diet and exercise program.

Limitations of Use

There are several situations where colesevelam is not indicated or has not been studied:

• It should not be used to treat type 1 diabetes or diabetic ketoacidosis.
• Its effectiveness and safety for blood sugar control have not been established in children.
• It has not been studied for cholesterol reduction in children younger than 10 years of age or in girls who have not yet started their menstrual periods.

Cholesterol Reduction

Colesevelam belongs to a class of medications known as bile acid sequestrants. It works by binding to bile acids in the digestive tract. Bile acids are substances produced by the liver using cholesterol to help the body break down and digest fats.

When colesevelam binds to these bile acids, it forms a complex that the body cannot absorb. This complex is eventually eliminated from the body through bowel movements. Because the bile acids are removed rather than recycled, the liver must produce more to replace them. To do this, the liver pulls LDL (bad) cholesterol out of the bloodstream, which results in lower overall blood cholesterol levels.

Blood Sugar Management

Colesevelam is also used to help improve blood sugar control in adults with type 2 diabetes. The exact mechanism for how the drug lowers blood sugar is not fully understood. It is believed that the medication's interaction with bile acids in the gut may influence certain pathways that help the body regulate glucose levels.

Common Side Effects

Many people using colesevelam experience mild digestive symptoms. Common side effects include:

• Constipation
• Nausea
• Indigestion or upset stomach
• Gas
• Stomach pain
• Diarrhea
• Muscle aches
• Sore throat or runny nose
• Weakness

Serious Side Effects

Some side effects require immediate medical attention. Contact a doctor right away if you experience:

• Severe stomach pain
• Severe or worsening constipation
• Symptoms of pancreatitis, such as intense pain in the upper stomach that radiates to the back, often with nausea and vomiting

Get emergency medical help if you have signs of an allergic reaction, including hives, difficulty breathing, or swelling of the face, lips, tongue, or throat.

High Triglycerides and Pancreatitis

Colesevelam can increase triglyceride levels in the blood. It is contraindicated in individuals with serum triglyceride levels greater than 500 mg/dL or those with a history of pancreatitis caused by high triglycerides. Healthcare providers typically monitor lipid levels before starting the medication and periodically during treatment to ensure levels remain within a safe range.

Gastrointestinal Obstruction

This medication should not be used by people with a history of bowel obstruction. It is used with caution in individuals with certain gastrointestinal conditions, including:

• Severe constipation
• Gastroparesis (delayed stomach emptying)
• Major gastrointestinal surgery
• Disorders of gastrointestinal motility

Because colesevelam can cause or worsen constipation, it is important to monitor for signs of bowel obstruction or fecal impaction while taking this drug.

Vitamin and Medication Absorption

Colesevelam may interfere with the absorption of fat-soluble vitamins, such as vitamins A, D, E, and K. Additionally, the drug can bind to other medications if taken at the same time, which may reduce their effectiveness. To minimize this risk, many other medications are typically taken at least four hours before taking colesevelam.

Phenylketonuria (PKU)

The oral suspension form of colesevelam contains phenylalanine. This is an important consideration for individuals with phenylketonuria who must limit their intake of this amino acid.

Pregnancy

Colesevelam is not absorbed from the digestive tract into the bloodstream. Because the medication does not enter the rest of the body, it is not expected to cause harm to an unborn baby. However, colesevelam can reduce the absorption of fat-soluble vitamins, such as vitamins A, D, E, and K. These vitamins are important for fetal development, so healthcare providers may monitor vitamin levels or recommend supplements during pregnancy.

Breastfeeding

It is unlikely that colesevelam will affect a nursing infant. Since the drug is not absorbed into the mother's system, it is not expected to be present in breast milk. There is limited data on the effects of the drug on milk production or the breastfed child.

Consult Your Healthcare Provider

If you are pregnant, planning to become pregnant, or breastfeeding, discuss the risks and benefits of colesevelam with your doctor. They can help determine if the medication is appropriate for your specific situation.

Available Forms

Colesevelam is provided in the following oral formulations:

• Tablets: These are solid oral tablets intended to be swallowed whole with a meal and liquid.
• Powder for Oral Suspension: This form consists of a powder packaged in individual packets. The powder must be thoroughly mixed with a liquid, such as water, fruit juice, or a diet soft drink, before it is swallowed.

FDA Approval and Indications

Colesevelam received its initial FDA approval in 2000. It is currently approved for use in the following areas:

• Cholesterol Management: Used alone or with other medications to reduce low-density lipoprotein cholesterol (LDL-C) in adults with primary hyperlipidemia.
• Pediatric Use: Approved to treat children aged 10 to 17 years who have heterozygous familial hypercholesterolemia, a genetic condition causing high cholesterol.
• Blood Sugar Control: Used as an add-on therapy to improve glycemic control in adults with type 2 diabetes mellitus.

Safety and Restrictions

The FDA has not issued any boxed warnings or required a Risk Evaluation and Mitigation Strategy (REMS) for colesevelam. However, its use is restricted in certain populations. It is not approved for treating type 1 diabetes or diabetic ketoacidosis. Additionally, it has not been studied for use in patients with specific types of high triglycerides (Fredrickson Type I, III, IV, and V hyperlipoproteinemia).

Colesevelam is available as a generic medication and is not classified as a controlled substance. It is available only with a prescription from a healthcare provider.

How Colesevelam Lowers Cholesterol

Colesevelam belongs to a class of medications known as bile acid sequestrants. It works by binding to bile acids in the intestines, preventing them from being reabsorbed into the bloodstream. Because the body needs bile acids for digestion, the liver must pull cholesterol from the blood to produce more of them. This process effectively reduces the levels of low-density lipoprotein (LDL), often referred to as bad cholesterol.

Usage and Effectiveness

This medication is intended for use alongside a heart-healthy diet and exercise program. It may be prescribed as a standalone treatment or in combination with other cholesterol-lowering drugs, such as statins. It is approved for:

• Adults with primary hyperlipidemia (high blood fat levels).
• Children aged 10 to 17 years with heterozygous familial hypercholesterolemia, a genetic condition causing high cholesterol.

Important Considerations

While colesevelam is effective at reducing LDL cholesterol, it is not used to treat high triglycerides. In some patients, the medication can actually cause triglyceride levels to increase. Healthcare providers typically monitor lipid levels before and during treatment to ensure the medication is working safely and effectively.