What the FDA labels say about taking them together
Heparin and sodium tetradecyl
Sodium tetradecyl's FDA label of June 26, 2024 names heparin in its drug interactions section; the heparin labels PlainMeds reads (4) do not name sodium tetradecyl.
Check it at the source: the heparin FDA label on DailyMed (effective November 28, 2025, Fresenius Kabi USA, LLC); the sodium tetradecyl FDA label on DailyMed (effective June 26, 2024, Hikma Pharmaceuticals USA Inc.).
What does the heparin label say about sodium tetradecyl?
Heparin's label (effective November 28, 2025) and its 3 other brand-application labels do not name sodium tetradecyl in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Heparin Sodium), Fresenius Kabi USA, LLC, effective November 28, 2025 (SPL set d55b4a63-0c04-4874-b74f-9e9b9e8b008c), via openFDA; the full label on DailyMed
What does the sodium tetradecyl label say about heparin?
Sodium tetradecyl label, drug interactionsThe physician must use judgment and evaluate any patient taking antiovulatory drugs prior to initiating treatment with sodium tetradecyl sulfate injection. (See ADVERSE REACTIONS section.) Heparin should not be included in the same syringe as sodium tetradecyl sulfate injection, since the two are incompatible.
Source: FDA drug label (Sodium Tetradecyl Sulfate), Hikma Pharmaceuticals USA Inc., effective June 26, 2024 (SPL set 997394e1-ec1f-4093-e053-2a95a90a0ea0), via openFDA; the full label on DailyMed
These are the labels' own sentences. PlainMeds does not grade interactions; a pharmacist or prescriber can say what they mean for one person's medicines.
Both medicines on the record
| Heparin | Sodium tetradecyl | |
|---|---|---|
| Labeled for | Blood clots (DVT and PE), Atrial fibrillation | n/a |
| Boxed warning | No | No |
| Pharmacy cost (NADAC) | $1.18 per mL 5,000 unit/mL vial | n/a |
| Shortage now | In shortage | No current entry |
Source: FDA NDC Directory, CMS NADAC of October 7, 2026 and the FDA Drug Shortage Database (FDA files October 8, 2026)
What next?
- Check more medicines together
- up to five at once