Based on PubMed | Is it safe to drink alcohol on an empty stomach while taking metoprolol, or does this increase the risk of low blood pressure, dizziness, or fainting?

Drinking alcohol while taking metoprolol can increase the chance of low blood pressure symptoms like dizziness, lightheadedness, and fainting, and this risk is generally higher if you drink on an empty stomach. Extended‑release metoprolol products carry specific advice to avoid alcohol because alcohol can alter release and intensify side effects. ^{[1] [2]} Alcohol itself can also add to drowsiness and lightheadedness when combined with metoprolol, which may raise the chance of feeling faint. ^{[3] [4]}

Why alcohol plus metoprolol can be risky

• Additive blood‑pressure lowering and sedation: Metoprolol lowers heart rate and blood pressure; alcohol can also lower blood pressure and impair reflexes, so together they can make you feel more dizzy or faint. ^{[3] [4]}
• Extended‑release concern: With extended‑release metoprolol capsules/tablets, alcohol may change how the drug is released, potentially leading to higher immediate exposure and stronger effects. That’s why consumer and professional guidance advises avoiding alcohol with extended‑release forms. ^{[1] [2] [5]}
• Empty stomach factor: Drinking on an empty stomach can lead to faster alcohol absorption and higher peak alcohol levels, which may intensify dizziness and low blood pressure sensations when taking a beta‑blocker like metoprolol. Studies in healthy volunteers show metoprolol can alter blood alcohol curves with repeated dosing, and high‑dose simultaneous use should be avoided. ^{[6] [7]}

What research and guidance suggest

• Consumer and clinical drug monographs advise not to drink alcohol with metoprolol extended‑release products, due to increased side‑effect risk and altered drug release. This is a clear “avoid” for extended‑release forms. ^{[1] [2] [5]}
• Alcohol can add to dizziness, lightheadedness, and fainting when used with metoprolol or metoprolol‑containing combinations. These effects are more likely at higher alcohol amounts or when taken without food. ^{[3] [4]}
• Small human studies suggest metoprolol does not “block” alcohol’s acute BP effects but may change alcohol levels with longer use; researchers caution against high-dose simultaneous intake. Practically, this supports limiting alcohol and avoiding empty‑stomach drinking while on metoprolol. ^{[8] [9] [6] [7]}

Practical recommendations

• If you take extended‑release metoprolol (often labeled ER, XL, or “extended‑release”), avoid alcohol altogether, because alcohol can disrupt the release mechanism and intensify side effects. ^{[1] [2] [5]}
• If you take immediate‑release metoprolol, it may be safer to either skip alcohol or keep it very moderate, and avoid drinking on an empty stomach to reduce rapid spikes in blood alcohol levels and dizziness. ^{[3] [4]}
• Start low and go slow: If you choose to drink, limit to one standard drink, take it with food, hydrate well, and stand up slowly to avoid lightheadedness. Avoid driving or operating machinery until you know how you feel. ^[2]
• Be aware of low‑blood‑sugar masking: Metoprolol can blunt warning signs of low blood sugar in some people, which alcohol can also affect; use extra caution if you have diabetes. ^[5]
• Stop and seek care if you experience severe dizziness, fainting, chest pain, or persistent low blood pressure symptoms.

Bottom line

• Extended‑release metoprolol + alcohol: avoid. ^{[1] [2] [5]}
• Immediate‑release metoprolol + alcohol: consider avoiding; if you do drink, keep it minimal, take with food, and monitor for dizziness or lightheadedness. ^{[3] [4]}
• Drinking on an empty stomach increases risk of symptomatic low blood pressure, so it’s best not to do so while on metoprolol. ^{[3] [4] [6] [7]}