Metoprolol Washout Period Guidelines

Pharmacokinetic Basis for Washout Duration

Metoprolol has a half-life of approximately 3-7 hours in patients with normal organ function, which directly governs how long the drug remains active in the body 1

The American College of Cardiology suggests that metoprolol tartrate (immediate-release) typically requires a shorter washout of 3 days given its shorter duration of action and twice-daily dosing 2
The American College of Cardiology recommends that metoprolol succinate (extended-release) may require the full 5-day washout due to sustained-release properties that maintain plasma levels longer 3, 1

The American College of Cardiology found that preoperative management studies evaluating perioperative beta-blocker therapy initiated treatment at least 7 days preoperatively, suggesting this timeframe allows adequate washout if switching from another agent 4

The American College of Cardiology warns that abrupt discontinuation of metoprolol can cause severe exacerbation of angina, myocardial infarction, and ventricular arrhythmias, with a 50% mortality rate reported in one study 1
Beta-blocker withdrawal is associated with a 2.7-fold increased risk of 1-year mortality compared to continuous use, according to the American College of Cardiology 1
The American College of Cardiology recommends that if a washout is medically necessary, the dose should be tapered by 25-50% every 1-2 weeks rather than stopping abruptly 1

The American College of Cardiology suggests tapering the metoprolol dose over 1-2 weeks by reducing 25-50% every few days 1
The American College of Cardiology recommends monitoring closely for rebound hypertension, tachycardia, or worsening angina during the taper 4
The American College of Cardiology advises extending the washout period to 7 days if the patient was on high doses or extended-release formulation to ensure complete elimination 4