Ezetimibe Side Effects: What to Expect and When to Call Your Doctor

One of the main reasons ezetimibe is prescribed — especially for patients who struggle with statins — is its generally favorable side effect profile. Unlike statins, ezetimibe doesn't work in the liver to block cholesterol production; instead it acts in the intestine, which changes what kinds of side effects it can cause and reduces the risk of muscle-related problems that statins sometimes cause.

That said, ezetimibe is not completely free of side effects, and some patients — especially those taking it in combination with a statin — may notice symptoms worth discussing with their doctor. Here's a complete rundown.

Common Side Effects of Ezetimibe (Zetia)

In clinical trials, ezetimibe as monotherapy had adverse effects similar to placebo — meaning most patients didn't experience noticeable side effects. When ezetimibe is taken alongside a statin (which is how it's most commonly prescribed), the side effect profile is slightly broader. The most commonly reported side effects include:

Nasopharyngitis (stuffy or runny nose, sore throat): One of the most frequently reported side effects in trials, especially when taken with a statin.

Upper respiratory tract infection: Cold-like symptoms were reported in a small percentage of patients in clinical trials.

Diarrhea: Because ezetimibe works in the intestine, some patients experience loose stools or mild diarrhea, particularly in the first few weeks.

Arthralgia (joint pain): Joint aching has been reported in some patients, though it's not always clear if this is drug-related.

Fatigue: A sense of tiredness or low energy has been reported by a small number of patients.

Back pain: Reported in some clinical trials, though generally mild and transient.

Myalgia (muscle aching): More common when ezetimibe is taken with a statin. Ezetimibe alone does not commonly cause muscle side effects.

Serious Side Effects: What to Watch For

While serious side effects are rare with ezetimibe, they can occur. Contact your doctor immediately or seek emergency care if you experience:

Muscle pain, weakness, or tenderness (especially with dark urine): This could indicate myopathy or, in rare cases, rhabdomyolysis — a dangerous breakdown of muscle tissue. This risk is highest when ezetimibe is combined with a statin, particularly in older adults or those with kidney disease.

Yellowing of the skin or eyes, dark urine, or severe abdominal pain: These are signs of liver problems (hepatotoxicity). While rare with ezetimibe alone, liver enzyme elevations have been reported, especially when combined with a statin.

Severe allergic reactions: Anaphylaxis, angioedema, hives, or swelling of the face, lips, or throat have been reported post-marketing. These are rare but require immediate medical attention.

Severe diarrhea or abdominal cramping: Mild diarrhea is common; severe, persistent diarrhea should be reported to your doctor.

Does Ezetimibe Cause Muscle Problems Like Statins?

This is one of the most common questions about ezetimibe. The answer: ezetimibe alone is much less likely to cause muscle problems than statins. Because it works in the intestine rather than blocking cholesterol synthesis in muscle and liver tissue, the myopathy risk for ezetimibe alone is very low — similar to placebo in clinical trials.

However, when ezetimibe is combined with a statin, the myopathy risk from the statin remains. If you were switched to ezetimibe because you couldn't tolerate a statin's muscle effects, ezetimibe monotherapy is significantly safer in that regard.

Can Ezetimibe Damage Your Liver?

Hepatotoxicity is possible but rare with ezetimibe. Cases of liver enzyme elevation and hepatitis have been reported post-marketing. The risk is highest when ezetimibe is combined with a statin, and liver function monitoring may be recommended based on your doctor's judgment. Ezetimibe is not recommended for patients with moderate-to-severe liver disease (Child-Pugh Class B or C).

Ezetimibe in Pregnancy and Breastfeeding

Ezetimibe combined with a statin is contraindicated in pregnancy. If you are pregnant or planning to become pregnant, tell your doctor — they will likely discontinue ezetimibe and any statin during pregnancy and breastfeeding. If you take ezetimibe alone (without a statin), discuss the risks and benefits with your doctor, as data on ezetimibe alone during pregnancy is limited.

When to Call Your Doctor

Call your doctor if you experience any of the following while taking ezetimibe:

Muscle pain, weakness, or unusual tiredness — especially with dark-colored urine

Yellow skin or eyes, nausea, stomach pain, or loss of appetite

Skin rash, hives, or swelling of the face, lips, throat

Diarrhea that is severe or doesn't improve after a few days

For information on drug interactions that may worsen side effects, see: Ezetimibe drug interactions: what to avoid and what to tell your doctor.

If you're struggling to find ezetimibe at your pharmacy, medfinder can locate nearby pharmacies that have it in stock.