Prothrombin Complex Concentrate (PCC) Dose Calculator
Prothrombin Complex Concentrate (PCC) Dose Calculator
Dose a four-factor prothrombin complex concentrate for warfarin reversal from weight and the presenting INR — and give 5 mg of intravenous vitamin K with it, every time, because the concentrate lasts hours and the warfarin lasts days.
Prothrombin Complex Concentrate (PCC) Dose
Weight × IU/kg by INR75 kg adult, presenting INR 5.0, four-factor PCC
Formula
INR 2.0–3.9 → 25 IU/kg | INR 4.0–6.0 → 35 IU/kg | INR above 6.0 → 50 IU/kg
Plus 5 mg intravenous vitamin K, in every case
- 25, 35 and 50 IU/kg
- the dosing table in the summary of product characteristics for Beriplex P/N, a four-factor concentrate. BSH’s warfarin guideline quotes the overall range as 25 to 50 u/kg of four-factor PCC, and the INR bands are how that range is allocated
- capped at 100 kg
- the product literature states maximum single doses of 2,500 IU for an INR of 2.0 to 3.9, 3,500 IU for 4.0 to 6.0 and 5,000 IU above 6.0 — the 100 kg dose for each tier. This calculator applies that cap
- four-factor
- factors II, VII, IX and X, with proteins C and S. A three-factor product contains little factor VII and does not correct an INR the same way, so a dosing table written for a four-factor concentrate should not be applied to it
- vitamin K is not optional
- PCC replaces the factors warfarin suppressed and is cleared over hours; warfarin’s effect lasts days. Without 5 mg of intravenous vitamin K the INR climbs again once the concentrate has gone, and the patient bleeds a second time
Worked example
75 kg adult, presenting INR 5.0, four-factor PCC
An INR of 5.0 falls in the 4.0 to 6.0 band, which is 35 IU/kg
75 × 35 = 2,625 IU of factor IX potency
Give 5 mg of intravenous vitamin K at the same time — the concentrate lasts hours, the warfarin days
The same patient at an INR of 3.5 would receive 25 × 75 = 1,875 IU, and above an INR of 6.0, 50 × 75 = 3,750 IU
A 120 kg patient at the same INR is dosed as 100 kg, so 3,500 IU — the stated maximum single dose for that band
Four-factor PCC dose by presenting INR
| Presenting INR | Dose | A 75 kg adult | Maximum single dose (100 kg and above) |
|---|---|---|---|
| 2.0–3.9 | 25 IU/kg | 1,875 IU | 2,500 IU |
| 4.0–6.0 | 35 IU/kg | 2,625 IU | 3,500 IU |
| Above 6.0 | 50 IU/kg | 3,750 IU | 5,000 IU |
What PCC reversal is and is not for
| Situation | PCC? | Notes |
|---|---|---|
| Major or life-threatening bleeding on warfarin | Yes, with 5 mg intravenous vitamin K | The indication. Corrects within 10 to 30 minutes, where plasma is slower, less complete and a far larger volume |
| Warfarin and genuinely urgent surgery that cannot wait for vitamin K | Yes, with vitamin K | Vitamin K alone takes 4 to 6 hours to begin working and longer to correct fully |
| Raised INR, no bleeding, no urgent procedure | No | Withhold warfarin and give oral vitamin K according to the INR. Reversing a number exposes the patient to thrombotic risk for no benefit |
| Direct oral anticoagulant, major bleeding, no specific antidote available | Sometimes, off licence | A different and much less well evidenced use. Where a specific antidote exists — idarucizumab for dabigatran, andexanet alfa for the factor Xa inhibitors — it is preferred |
| Direct oral anticoagulant, raised clotting times, no bleeding | No | These agents wear off. There is nothing to reverse |
Reverse the bleeding, not the number — and never without vitamin K
A four-factor prothrombin complex concentrate replaces the vitamin K dependent factors that warfarin suppresses — II, VII, IX and X, with proteins C and S — and does it within 10 to 30 minutes in a small volume. That speed is the whole case for it over plasma, which corrects more slowly, less completely and at a litre or more of circulatory load. The British Society for Haematology’s warfarin guideline puts it plainly: correction is achieved more rapidly with PCC than with fresh frozen plasma, and plasma cannot be recommended for life-threatening bleeding on warfarin.
The dose is weight-based and banded by the presenting INR. The summary of product characteristics for a four-factor concentrate gives 25 IU/kg for an INR of 2.0 to 3.9, 35 IU/kg for 4.0 to 6.0 and 50 IU/kg above 6.0, which is how the 25 to 50 u/kg range quoted by BSH is allocated. Above 100 kg the dose is capped: the maximum single doses stated are 2,500, 3,500 and 5,000 IU for the three tiers. The dose is expressed in international units of factor IX potency, because that is how these products are labelled, and some services give a fixed 500 or 1,000 IU and titrate on a repeat INR instead.
Vitamin K is not an optional extra and the reason is a mismatch of timescales. PCC is cleared over hours; warfarin’s anticoagulant effect lasts days. Give the concentrate alone and the INR corrects beautifully, then climbs again overnight as the concentrate disappears and the warfarin is still there, and the patient bleeds a second time. Five milligrams of intravenous vitamin K, given at the same time, begins working within four to six hours and holds the correction the concentrate bought. Omitting it is the commonest serious error in warfarin reversal.
Reversal is for major bleeding or for surgery that genuinely cannot wait, not for a raised INR on its own. A high INR without bleeding is managed by withholding warfarin and giving vitamin K, because reversing a number exposes a patient who was anticoagulated for a reason to thrombotic risk for no benefit. PCC for direct oral anticoagulant reversal is a separate question and a much weaker evidence base — largely observational data and surrogate endpoints — and where a specific antidote exists, idarucizumab for dabigatran or andexanet alfa for the factor Xa inhibitors, that is preferred. Every dose here supports a clinician’s prescription rather than replacing it, and blood products are given against a clinical indication, not against a number.
Frequently asked questions
What dose of PCC is used for warfarin reversal?
Twenty-five to 50 u/kg of a four-factor concentrate, allocated by the presenting INR: 25 IU/kg for an INR of 2.0 to 3.9, 35 IU/kg for 4.0 to 6.0 and 50 IU/kg above 6.0. Above 100 kg the maximum single doses are 2,500, 3,500 and 5,000 IU respectively.
Does PCC have to be given with vitamin K?
Yes. PCC is cleared over hours while warfarin’s effect lasts days, so without 5 mg of intravenous vitamin K the INR corrects and then rebounds once the concentrate has gone. Vitamin K begins working within four to six hours and holds the correction.
Should a raised INR be reversed if the patient is not bleeding?
No. Reversal is for major bleeding or genuinely urgent surgery. A high INR alone is managed by withholding warfarin and giving vitamin K, because reversing a number exposes a patient anticoagulated for a reason to thrombotic risk without any benefit.
Is PCC better than fresh frozen plasma for warfarin reversal?
Yes, for major bleeding. BSH states that correction is achieved more rapidly and more completely with PCC than with plasma, and that plasma cannot be recommended for life-threatening bleeding on warfarin. PCC also avoids a litre or more of circulatory load.
Can PCC be used to reverse a direct oral anticoagulant?
It is used off licence for major bleeding when no specific antidote is available, but the evidence is much weaker — largely observational data and surrogate endpoints. Where a specific antidote exists, idarucizumab for dabigatran or andexanet alfa for the factor Xa inhibitors, it is preferred.
Related calculators
References
- Keeling D, Baglin T, Tait C, et al. Guidelines on oral anticoagulation with warfarin — fourth edition. Br J Haematol. 2011;154(3):311–324.
- Makris M, Van Veen JJ, Tait CRM, et al. Guideline on the management of bleeding in patients on antithrombotic agents. Br J Haematol. 2013;160(1):35–46.
- CSL Behring. Beriplex P/N 1000 IU Summary of Product Characteristics. electronic Medicines Compendium; 2024.
Medical Disclaimer: The tools and content provided here are for educational and reference purposes only. They are not intended to substitute for professional medical advice, diagnosis, or treatment. Clinical decisions should always be based on the comprehensive assessment of a qualified healthcare professional.