Mirtazapine Tablet Splitting Safety
Splitting mirtazapine tablets is not universally safe and should be done only when the specific product is labeled as splitable and when dosing adjustments are directed by a clinician [1].
FDA Guidance on Splitting Medications
Tablet splitting should be performed only under healthcare-professional supervision [1]. An FDA-labeled product that is approved to be split will list this in the professional and patient labeling and will be scored to indicate where to split [1]. When splitting information is not present in labeling, FDA has not evaluated whether split halves deliver the same weight or drug content as the whole tablet [1].
Orally Disintegrating Mirtazapine Products
Mirtazapine orally disintegrating tablets should not be broken or split [2]. MedlinePlus also states not to split mirtazapine disintegrating tablets [3].
Mirtazapine Conventional Tablets
For mirtazapine that is a conventional tablet formulation, splitting safety depends on whether that specific tablet strength and manufacturer product is labeled as splitable (for example, presence of a score line and labeling that supports splitting) [1].
Practical Dose-Reduction Approach
A clinician-directed alternative to splitting is preferred when the current product cannot be confirmed as splitable in labeling [1].
What To Check Before Any Dose Change
Verification of the exact product (tablet vs orally disintegrating tablet) is recommended before any splitting is attempted [2], [3]. Verification of splitability information in the medication labeling for the exact strength and formulation is recommended before any splitting is attempted [1].
When to Seek Clarification
If the prescription or bottle label indicates a dose adjustment that requires splitting, clarification with a pharmacist or prescriber is recommended before splitting any supply [1].