Can you split Lantus tablets?
Splitting tablets is a common practice — for fine dose adjustment, to ease swallowing, or to extend a prescription. For Lantus (Insulin Glargine) at 100 IU/mL, whether splitting is appropriate depends on tablet design, formulation and clinical context, and the answer is not always intuitive.
When tablets can be split
Tablets with a score line are designed for splitting and can be divided into roughly equivalent halves. Plain (un-scored) tablets often produce uneven halves and inconsistent dosing. Modified-release, enteric-coated and certain film-coated formulations should never be split because doing so destroys the controlled-release mechanism. The prescribing information for Insulin Glargine states whether splitting is permitted at 100 IU/mL.
Practical guidance
According to general pharmacy practice, splitting is best done with a tablet splitter rather than by hand or knife — the splitter produces more consistent halves. Splitting should never be a substitute for the prescriber confirming the right dose; if a half-dose is needed routinely, asking for the appropriate strength avoids the dosing variability inherent in splitting.
Frequently asked questions
Is it safe to split a Lantus tablet? ▾
For tablets with a score line, generally yes. For plain or modified-release tablets, no — splitting can produce uneven doses or destroy the formulation. The prescribing information for Insulin Glargine should specify whether splitting is appropriate at 100 IU/mL.
Can I split Lantus to make my supply last longer? ▾
Routine splitting just to extend supply is not recommended; it produces inconsistent doses and may reduce treatment effect. If supply is the issue, the pharmacist or prescriber can usually arrange a renewal or alternative formulation rather than splitting compromising the effect of Insulin Glargine at 100 IU/mL.
More on Lantus
- With alcoholLantus and alcohol — is it safe to drink?
- With foodShould Lantus be taken with food?
- Side effectsLantus side effects: common, rare and warning signs
- Dosage guideLantus dosage guide: how much to take and when
- OnsetHow fast does Lantus start working?
- DurationHow long does Lantus last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.