PROTAMINE

Antidote for heparin over dose

Dosage Forms

Solution for Injection

10 mg/ml

Uses

  • Reversal of the anticoagulant effect of unfractionated or low molecular weight heparin

Dose and Duration

Reversal of over dosage with intravenous injection of unfractionated heparin

Administer by slow IV injection at a rate not exceeding 5 mg/ minute (max 50 mg)

Time since heparin (min) Dose of protamine (adult and child)
0–15 1 mg neutralizes 100 IU
15–30 1 mg neutralizes 100 IU
30–60 0.5–0.75 mg neutralizes 100 IU
60–120 0.375–0.5 mg neutralizes 100 IU
Over 120 0.25–0.375 mg neutralizes 100 IU
Reversal of over dosage with intravenous infusion of unfractionated heparin

Adult: stop infusion of heparin, then administer 25–50 mg of protamine by slow IV injection

Child 1 month–18 years: dose same as for over dosage of heparin by intravenous injection

Reversal of over dosage with subcutaneous injection of unfractionated heparin

Adult: 1 mg of protamine neutralises 100 IU of heparin. Administer 25–50 mg by slow IV injection then the remaining dose by IV infusion over 8–16 hours

Child 1 month–18 years: 1 mg neutralises 100 IU of heparin. Give 50–100% of total dose by IV injection then the remainder by IV infusion over 8–16 hours

Reversal of over dosage with subcutaneous injection of low molecular weight heparin

Adult and child: 1 mg neutralizes 100 IU by intermittent IV injection or by continuous IV infusion (consult product literature)

Contra-indications

  • Hypersensitivity

Side Effects

  • Nausea, vomiting
  • Back pain, tiredness
  • Dyspnoea
  • Bradycardia, flushing, hypotension, hypertension
  • Hypersensitivity

Pregnancy

  • Can be used

Breast-feeding

  • Can be used

⚠️ Caution

  • Do not administer too rapidly
  • Not suitable for reversal of effects of oral anticoagulants
  • Increased risk of allergic reactions in patients who have been previously treated with protamine or protamine insulin, patients with fish allergies and men who are infertile or who have had a vasectomy