Bupropion XL Cannot Be Cut in Half
Bupropion XL (extended-release) tablets must NOT be cut, split, crushed, divided, or chewed 1. The FDA-approved prescribing information explicitly states that bupropion hydrochloride extended-release tablets (XL) "should be swallowed whole and not crushed, divided, or chewed" 1.
Why Splitting is Dangerous
The extended-release formulation is specifically designed to release the medication slowly over 24 hours. When you cut, crush, or split the tablet:
Seizure risk increases dramatically: The controlled-release mechanism is destroyed, causing immediate release of the full dose rather than gradual release throughout the day. This creates dangerously high peak blood levels that significantly increase seizure risk—bupropion's most serious dose-related adverse effect 1.
Loss of therapeutic effect: The medication may be released too quickly, leaving inadequate drug levels later in the dosing interval, compromising efficacy.
Unpredictable dosing: You cannot reliably achieve half the dose by splitting—the active ingredient is not uniformly distributed, and the extended-release matrix is disrupted 2.
What to Do Instead
If dose adjustment is needed:
Request the appropriate strength: Bupropion XL is available in 150 mg and 300 mg tablets. If you need 150 mg, your prescriber should write for the 150 mg tablet 1.
Follow FDA-approved titration: For major depressive disorder, start at 150 mg once daily, then increase to 300 mg after 4 days if needed. For seasonal affective disorder, start at 150 mg, then increase to 300 mg after 7 days 1.
Tapering requires the lower strength: When discontinuing 300 mg daily, you must decrease to 150 mg once daily before stopping—this requires obtaining the 150 mg tablets, not splitting the 300 mg tablet 1.
Critical Safety Point
Bupropion lowers the seizure threshold in a dose-dependent manner. The extended-release formulation was specifically developed to minimize peak concentrations and reduce seizure risk compared to immediate-release formulations 1. Splitting the XL tablet defeats this safety mechanism and is contraindicated in patients with seizure disorders, brain metastases, or other conditions that increase seizure risk 3, 1.
Contact your prescriber or pharmacist if you have the wrong tablet strength—never attempt to split extended-release bupropion tablets.