Ezetimibe Side Effects
Ezetimibe is generally well-tolerated with an overall side effect profile similar to placebo, though it can cause mild gastrointestinal symptoms, muscle-related complaints, and rarely, liver enzyme elevations or serious hepatotoxicity 1.
Serious Side Effects (Require Immediate Medical Attention)
Hepatotoxicity
- Increased liver enzymes can occur with ezetimibe alone or combined with statins 1
- Your provider should check liver function tests before starting treatment and monitor during therapy
- Treatment may need to be stopped if liver enzymes become significantly elevated
- Rare cases of severe hepatocellular injury have been reported, requiring prompt drug withdrawal 2
- One case series documented severe isolated hyperbilirubinemia (jaundice) in a patient with underlying liver disease 3
Muscle Problems (Myopathy/Rhabdomyolysis)
- Muscle pain, tenderness, weakness, or unusual fatigue can develop 1
- Risk increases significantly when combined with statins or fibrates 1
- Stop the medication and contact your provider immediately if muscle symptoms occur
- Muscle breakdown (rhabdomyolysis) is possible, though uncommon 4
Allergic Reactions
Stop ezetimibe immediately if you develop 1:
- Swelling of face, tongue, or throat
- Difficulty breathing or swallowing
- Severe skin rash, hives, or itching
- Fainting or severe dizziness
- Very fast heartbeat
Common Side Effects
When Taking Ezetimibe Alone
1:
- Upper respiratory tract infection
- Joint pain
- Pain in arms or legs
- Flu-like symptoms
- Diarrhea
- Sinus inflammation
- Fatigue
When Taking Ezetimibe With a Statin
1:
- Runny nose, sore throat
- Joint pain
- Flu-like symptoms
- Muscle aches and pains
- Diarrhea
- Pain in arms or legs
- Upper respiratory tract infection
- Back pain
- Fatigue
Important Clinical Context
The overall incidence of side effects with ezetimibe is similar to placebo 5. According to the 2022 BMJ guideline, adverse reactions are described as "mild and transient, including gastrointestinal events, myalgia or muscular pain, hepatic dysfunction, headache, and fatigue" 5. The 2019 AHA/ACC guideline confirms ezetimibe "has a low incidence of side effects" 6.
Potential Cancer Signal (Controversial)
A 2023 meta-analysis found ezetimibe may increase intestinal cancer risk (RR 1.30) and showed a trend toward increased breast cancer (RR 1.39), though overall cancer risk was not significantly elevated 7. This remains controversial and requires further long-term study.
Drug Interactions That Increase Side Effect Risk
Tell your provider if you take 1:
- Cyclosporine (immunosuppressant)
- Fibrates (cholesterol medications)
- Bile acid sequestrants (take ezetimibe 2 hours before or 4 hours after these)
- Statins (increases muscle problem risk)
Special Populations
- Pregnancy/breastfeeding: Avoid ezetimibe entirely 5, 1
- Liver disease: Use with caution; monitor liver function closely 1, 3
- Age ≥75 years: Generally well-tolerated in elderly patients for primary prevention 8