Yes. 28 FDA-approved labels for Enoxaparin carry a boxed warning, and its subject is spinal/epidural hematomas. A boxed warning is the most serious warning the FDA requires on a prescription label. It is applied to the drug and to the situations in which it is used, not to any particular person taking it.
What the warning says
Below is how the Enoxaparin warning opens on one specific label, identified underneath it. Of the 25 Enoxaparin labels sampled, 6 carried materially different wordings, and this was the most common, used by 14 of them.
WARNING: SPINAL/EPIDURAL HEMATOMAS Epidural or spinal hematomas may occur in patients who are anticoagulated with low molecular weight heparins (LMWH) or heparinoids and are receiving neuraxial anesthesia or undergoing spinal puncture. These hematomas may result in long-term or permanent paralysis. Consider these risks when scheduling patients for spinal procedures.
ENOXAPARIN SODIUM, NorthStar RxLLC, label version effective 21 June 2024. Opening of the warning; read the full label on DailyMed.Why the wording differs between manufacturers
There is no single official text of a boxed warning. The FDA sets what a warning must cover, and each manufacturer writes its own label within that. Of the 25 Enoxaparin labels sampled for this page, 6 carried materially different wordings of the same warning, and the version quoted above was used by 14 of them.
The hazard does not change between those 6 versions. Only the sentences do, which is why a refill from a different manufacturer can carry warning text that reads differently without anything about Enoxaparin or its risks having changed.
Enoxaparin is dispensed under 28 current FDA labels despite this warning, which is the point worth holding onto: a boxed warning is a disclosure requirement, not a verdict. What a boxed warning does and does not mean sets out the distinction.
Common questions
Does Enoxaparin have a black box warning?
Yes. 28 FDA-approved labels for Enoxaparin carry a boxed warning, and its subject is spinal/epidural hematomas. A boxed warning is the strongest warning the FDA requires on a prescription label, and it is applied to the drug, not to any individual taking it.
What does the Enoxaparin boxed warning say?
The wording is set by each manufacturer within FDA requirements, so it varies. In the version quoted on this page, taken from a label effective 21 June 2024, the warning concerns spinal/epidural hematomas. The full text is linked so the exact version can be read rather than summarised.
Does the Enoxaparin boxed warning mean the drug is unsafe or being withdrawn?
No. It means the FDA requires the risk of spinal/epidural hematomas to be communicated prominently so prescribers weigh it explicitly. Enoxaparin remains FDA-approved and is dispensed under 28 current labels. A boxed warning is a disclosure requirement, not a judgement that a drug should not be used.
Why do different pharmacies show different warning text for the same drug?
Because each manufacturer writes its own label within the FDA's requirements. Of 25 Enoxaparin labels sampled here, 6 carried materially different wordings of the same warning. The hazard described is the same; the sentences are not. This is a common source of confusion when a prescription is refilled with a different manufacturer's product.
Should I stop taking Enoxaparin because of this warning?
This page does not answer that and cannot. The warning about spinal/epidural hematomas is written for a prescriber deciding whether Enoxaparin suits a particular patient, and stopping a prescribed medicine carries its own risks that this page knows nothing about. Raise it with the prescriber or a pharmacist, who can see the whole picture.
Where this page's information comes from
The quotation above is from one Enoxaparin label, linked below by its DailyMed set identifier so the exact version can be opened rather than taken on trust. The figure of 28 labels, and the count of 6 distinct wordings among 25 sampled, were computed from the openFDA labelling API on 30 August 2026.
- ENOXAPARIN SODIUM prescribing information, NorthStar RxLLC, effective 21 June 2024.
- openFDA drug labelling API, the source of the label counts and variant counts on this page.
Labels are revised over time. The version linked above is the one this page was written against, and a newer revision may differ. Counts reflect the labels present in openFDA on the retrieval date.