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Colesevelam Side Effects

Medically reviewed by Drugs.com. Last updated on Dec 9, 2023.

Applies to colesevelam: oral powder for suspension, oral tablet.

Serious side effects of Colesevelam

Along with its needed effects, colesevelam may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking colesevelam:

More common

Less common

Incidence not known

Other side effects of Colesevelam

Some side effects of colesevelam may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Less common

For Healthcare Professionals

Applies to colesevelam: oral powder for reconstitution, oral tablet.

General

The most frequently reported side effects were constipation, dyspepsia, and nausea.[Ref]

Gastrointestinal

Very common (10% or more): Constipation (up to 11%), flatulence

Common (1% to 10%): Dyspepsia, nausea, vomiting, diarrhea, abdominal pain, abnormal stools, abdominal distension

Uncommon (0.1% to 1%): Dysphagia

Very rare (less than 0.01%): Pancreatitis

Frequency not reported: Intestinal obstruction

Postmarketing reports: Bowel obstruction, esophageal obstruction, fecal impaction, exacerbation of hemorrhoids, pancreatitis[Ref]

Metabolic

Common (1% to 10%): Hypertriglyceridemia, hypoglycemia[Ref]

Cardiovascular

Common (1% to 10%): Hypertension, myocardial infarction, aortic stenosis, bradycardia[Ref]

Respiratory

Common (1% to 10%): Pharyngitis, rhinitis, nasopharyngitis, upper respiratory tract infection[Ref]

Other

Common (1% to 10%): Accidental injury, asthenia, flu syndrome/influenza, fatigue, creatine phosphokinase increased

Uncommon (0.1% to 1%): Serum transaminases increased[Ref]

Musculoskeletal

Common (1% to 10%): Myalgia, back pain[Ref]

Nervous system

Common (1% to 10%): Headache

Postmarketing reports: Increased seizure activity (resulting from decreased phenytoin levels)[Ref]

Hypersensitivity

Frequency not reported: Hypersensitivity reaction[Ref]

In clinical trials of type 2 diabetes, patient who received this drug as an add on to a sulfonylurea discontinued the trial due to body rash and mouth blistering that occurred on the first day of therapy.[Ref]

Hematologic

Postmarketing reports: Reduced international normalized ration (INR) in patient on warfarin therapy

Hepatic

Postmarketing reports: Increased transaminases

Endocrine

Postmarketing reports: Elevated thyroid-stimulating hormone (TSH) in patients receiving thyroid hormone replacement

References

1. Product Information. Welchol (colesevelam). Daiichi Sankyo, Inc. 2001;PROD.

2. Cerner Multum, Inc. UK Summary of Product Characteristics.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.