Based on NIH | Does coconut oil interact with metoprolol, and is it safe to use coconut oil or MCT supplements while taking this medication?

There is no known direct interaction between coconut oil (including MCT oil) and metoprolol, and most people can use these oils while taking metoprolol with appropriate caution. Metoprolol’s official information highlights interactions with certain medicines and alcohol, but it does not list coconut oil or MCT oil as interacting substances. ^{[1] [2]} In general, metoprolol can be taken with food, and food can modestly increase its bioavailability without causing safety problems, which suggests that typical dietary fats do not pose a specific risk. ^{[3] [4]}

What we know about metoprolol interactions

• Metoprolol’s key interactions involve other heart‑rate–lowering drugs, certain antidepressants, and alcohol; dietary oils are not listed among clinically significant interactions. This means coconut or MCT oil are not expected to change metoprolol’s effect directly. ^{[1] [2]}
• Extended‑release metoprolol can be taken with meals, and studies show that food may enhance absorption without harmful effects, reinforcing that normal dietary fats are acceptable. There is no signal that specific fats like coconut oil uniquely alter metoprolol’s absorption. ^{[3] [4]}

Coconut/MCT oil and cardiovascular safety

• Coconut oil is high in saturated fats (notably lauric acid) and tends to raise LDL (“bad”) cholesterol compared with unsaturated plant oils; replacing coconut oil with unsaturated oils lowers total and LDL cholesterol in trials. Short‑term studies suggest coconut oil is less harmful than butter but worse than oils like canola or safflower for cholesterol. ^[5]
• Because higher LDL is linked with cardiovascular risk over time, frequent or high‑dose coconut oil may not be ideal for heart health, especially for those with high cholesterol or existing cardiovascular disease. MCT oil (typically caprylic/capric acids) may have different metabolic effects and usually has a more neutral lipid profile, but robust long‑term heart outcomes data are limited. ^[5]

Practical guidance if you use coconut or MCT oil with metoprolol

• Dose form matters: If you take metoprolol extended‑release capsules, avoid alcohol‑containing products because alcohol can alter release; this warning does not apply to coconut or MCT oil. Taking the medicine consistently with or without a meal is reasonable, and consuming normal dietary fat with meals is acceptable. ^{[2] [6]}
• Monitor for beta‑blocker effects: Adding any supplement while on metoprolol warrants watching for dizziness, fatigue, slow heart rate, or low blood pressure, not because coconut/MCT oil causes these, but to ensure your regimen remains well‑tolerated. Metoprolol can cause lightheadedness on its own, so keep an eye on symptoms when changing your diet or supplements. ^{[7] [6]}
• Consider your lipid levels: If you have high LDL or other risk factors, limiting coconut oil and favoring unsaturated oils (e.g., olive, canola) is typically a heart‑healthier choice. MCT oil may be preferable to coconut oil regarding LDL impact, but discuss with your clinician if you have cholesterol concerns. ^[5]

Bottom line

• There is no evidence of a direct drug–supplement interaction between coconut oil/MCT oil and metoprolol, and using these oils in typical dietary amounts appears safe for most people on metoprolol. However, coconut oil can raise LDL cholesterol compared with unsaturated oils, so regular or high intake may not be ideal for heart health. ^{[1] [2] [5]}
• If you choose to use coconut or MCT oil, keep portions moderate, maintain consistency in how you take metoprolol with meals, avoid alcohol with extended‑release capsules, and monitor blood pressure, heart rate, and cholesterol. Discuss with your clinician if you have cardiovascular disease, high cholesterol, diabetes, or if you take additional medications that could affect heart rate or blood pressure. ^{[2] [6]}