Do I need to avoid eating aged cheese at night while taking metoprolol due to a potential tyramine interaction?

You do not need to avoid aged cheese because of tyramine while taking metoprolol. Tyramine‑related food restrictions apply to monoamine oxidase inhibitors (MAOIs), not to beta‑blockers like metoprolol. ^[1] MAOIs can cause dangerous blood pressure spikes when combined with high‑tyramine foods such as aged cheeses, cured meats, and draft beer, which is why strict tyramine avoidance is recommended for those drugs. ^[1] In contrast, metoprolol does not share this tyramine interaction, and authoritative patient guidance for metoprolol focuses on avoiding alcohol with certain extended‑release products and being cautious with some over‑the‑counter cold or decongestant medicines not on tyramine or aged cheese. ^[2]

Why tyramine is a concern with MAOIs, not metoprolol

• MAOIs block the enzyme (monoamine oxidase) that breaks down tyramine, so tyramine from aged or fermented foods can accumulate and trigger a sharp rise in blood pressure. ^[1] Because of this, people on MAOIs are advised to stay away from foods high in tyramine, especially aged cheeses and cured or fermented products. ^[1]
• Metoprolol is a cardioselective beta‑1 blocker and does not inhibit monoamine oxidase, so it does not cause the “cheese reaction.” There is no standard recommendation to restrict tyramine when taking metoprolol. ^[2]

Practical guidance while taking metoprolol

• Food: There is no tyramine restriction with metoprolol; aged cheese at night is acceptable from a drug‑interaction standpoint. ^[2]
• Alcohol: Guidance for metoprolol cautions against alcohol with extended‑release capsules because it can affect the release profile and increase side effects like dizziness or low blood pressure. ^[2]
• OTC products: Decongestants and certain “cold/sinus” remedies can raise blood pressure and may counteract blood‑pressure control; check labels and ask a clinician or pharmacist before using them. ^[2]

What if you’re on other medications?

If you ever start or are prescribed an MAOI antidepressant (for example, isocarboxazid, phenelzine, or tranylcypromine), strict avoidance of high‑tyramine foods including aged cheeses would then be important to prevent hypertensive crises. ^[1] Even some selective MAO‑B inhibitors used for Parkinson’s disease can have cautions with very high‑tyramine foods at higher doses, so it’s always best to review your full medication list with a professional. ^[1]

Key takeaway

• Metoprolol does not have a clinically significant tyramine–food interaction, and you do not need to avoid aged cheese because of metoprolol. ^[2]
• Tyramine restrictions are specific to MAOIs; if you are not on an MAOI, those food rules do not apply. ^[1]

If you’d like help reviewing your current medication list for any potential food or drug interactions, I can walk through it with you.