heparin sodium: prescribing and clinical use
Focused clinical detail for use alongside current product information, local policy and patient-specific assessment.
heparin sodium: clinical details
Prescribing considerations
- Confirm the indication, route and exact formulation; catheter-flush products are not interchangeable with systemic preparations.
- Assess bleeding risk, recent procedures, renal and hepatic function, previous heparin exposure, interacting medicines and planned neuraxial procedures.
- Check for benzyl alcohol or other preservatives, particularly in pregnancy, neonates and young children.
- Consider heparin resistance or antithrombin deficiency if the expected response is not achieved.
Contraindications and cautions
- Current or previous immune-mediated heparin-induced thrombocytopenia, subject to product-specific wording.
- Active major or uncontrollable bleeding, or a generalised or local haemorrhagic tendency.
- Hypersensitivity to heparin, relevant excipients or porcine derivatives where specified.
- Certain regional or epidural anaesthetic procedures during therapeutic anticoagulation.
- Product-specific restrictions include intravenous diclofenac co-administration and benzyl-alcohol-containing formulations in neonates or other defined groups.
Monitoring
- Use an appropriate coagulation assay for therapeutic systemic anticoagulation.
- Measure platelets at baseline and during continued or repeated exposure according to product-specific requirements; investigate a substantial fall or new thrombosis promptly.
- Monitor haemoglobin or haematocrit and assess for bleeding when clinically indicated.
- Measure potassium before and during prolonged treatment in patients at risk of hyperkalaemia.
- After neuraxial procedures, monitor urgently for back pain, sensory or motor deficits and bladder or bowel dysfunction.
Clinical pharmacology
Unfractionated heparin potentiates antithrombin-mediated inhibition of thrombin and factor Xa. Its effect begins rapidly after intravenous administration, but response and elimination vary substantially.
Formulation and product differences
- Products include systemic injection or infusion concentrates, ready-to-use heparin in sodium chloride for extracorporeal use or catheter patency, and dedicated catheter flushes.
- Some systemic products are preservative-free; others contain benzyl alcohol and have additional restrictions.
- Licensed indications, routes, excipients, compatibility and handling instructions differ; formulations are not necessarily interchangeable.
- Heparin is commonly sourced from porcine intestinal mucosa.
Heparin Sodium BP 5000 IU/L in 0.9% w/v Sodium Chloride IV Infusion — Current selected SmPCHeparin Sodium Vials 25,000 IU in 5ml (5,000 IU in 1 ml) — Current selected SmPCHeparin Sodium 5,000 I.U./ml Solution for injection (without preservative) — Current selected SmPCHeparin (Mucous ) Injection BP 5,000 IU — Current selected SmPCHeparin Sodium 100 I.U./ml flushing solution for maintenance of patency of intravenous devices (Wockhardt UK Ltd) (PL 29831/0111) — Current selected SmPCHeparin sodium 1,000 I.U./ml Solution for injection or concentrate for solution for infusion (without preservative) (PL 29831/0105) — Current selected SmPC
heparin sodium preparations and strengths
Injection
Route: Parenteral
Strengths: 1000 units, 5000 units
heparin sodium interactions
Check all prescribed, over-the-counter and herbal products because combinations can alter bleeding risk or heparin response.
Antiplatelets, thrombolytics, other anticoagulants, salicylates and NSAIDs
May increase bleeding risk and require careful assessment and monitoring.
Intravenous diclofenac
Concomitant use is contraindicated for selected Wockhardt heparin injection and flush products.
Heparin Sodium 100 I.U./ml flushing solution for maintenance of patency of intravenous devices (Wockhardt UK Ltd) (PL 29831/0111) — Current selected SmPCHeparin sodium 1,000 I.U./ml Solution for injection or concentrate for solution for infusion (without preservative) (PL 29831/0105) — Current selected SmPC
Sources
These sources were used to prepare and review this medicine page.
Heparin Sodium 5,000 I.U./ml Solution for injection (without preservative) — Current selected SmPCSummary of Product Characteristics · emc
Heparin (Mucous ) Injection BP 5,000 IU — Current selected SmPCSummary of Product Characteristics · emc
Heparin Sodium BP 5000 IU/L in 0.9% w/v Sodium Chloride IV Infusion — Current selected SmPCSummary of Product Characteristics · emc
Heparin Sodium 100 I.U./ml flushing solution for maintenance of patency of intravenous devices (Wockhardt UK Ltd) (PL 29831/0111) — Current selected SmPCSummary of Product Characteristics · emc
Prepared and reviewed by the iatroX editorial team.