Condition category
Circulatory System
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting

Plain English Summary

Background and study aims
Stroke affects nearly 100,000 people in the UK every year, and only half of all stroke survivors make a full recovery. Rehabilitation leads to improvements in many cases, but it is possible that other treatments can improve recovery even further. One such treatment is Erythropoietin (EPO), which is a purified artificially produced hormone that stimulates the growth of stem cells, especially in the bone marrow, which leads to an increase in the production of red blood cells. It also stimulates the growth of other stem cells involved in repair and some studies have suggested that it may increase brain repair in patients who have suffered stroke. EPO has been used routinely for several years to treat anaemia. The aim of the study find out if treatment with EPO, together with rehabilitation further improves recovery.

Who can participate?
Men and women aged between 18 and 85 years who are approached to take part within 48 hours of having a stroke, and do not already have a significant disability.

What does the study involve?
Eligible patients will undergo a comprehensive MR imaging for blood flow, concentration of different chemicals and connections across the brain. Following this, patients will be randomly allocated to one of three groups. The control group will receive standard of care treatment with therapists and the rehabilitation team. The second group will receive the drug erythropoietin (EPO) on three occasions injected into the vein on days 1, 3 and 5. The third group will receive the drug rhEPO injected into the vein on days 7, 14 and 21. Patients will be monitored for 1 week after the treatment with clinical examination and blood tests. The EPO injection will not be given if blood tests show too much blood is being produced. Further analyses will be made 30 and 90 days after being included in the study. A further MRI scan of the head will be done to assess recovery.

What are the possible benefits and risks of participating?
A possible individual benefit of being treated with EPO cannot be stated at this point in time but the results of the study will contribute to a better public knowledge about the best treatment for rehabilitation after a stroke. Like most drugs, EPO could cause some side effects or an allergic reaction. The most common side effects include a rise in blood pressure, headache, nausea and joint pains which occur in about 1 in 10 patients especially at the start of treatment. About 1 in 100 patients show an increase in the number of platelets that can increase the risk of clots. Other side effects include diarrhoea, flu-like illness, rash, and vomiting which may occur in 1-2 in 100 patients. Allergic reactions are rare and include rash, itching, and very rarely swelling of the tongue and mouth.

Where is the study run from?
The study is run from King’s College Hospital NHS Foundation Trust and the Department of Clinical Neurosciences, King’s College London, UK.

When is the study starting and how long is it expected to run for?
The study started in November 2012 and is expected to run for 18 months.

Who is funding the study?
National Institute for Health Research (NIHR), UK.

Who is the main contact?
Prof Lalit Kalra

Trial website

Contact information



Primary contact

Prof Lalit Kalra


Contact details

King's College Hospital NHS Trust
Bessemer Road
United Kingdom

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

Erythropoeitin to facilitate stroke recovery: a randomised trial


Study hypothesis

The research will be undertaken in 3 groups of 30 stroke patients each who are within 48 hours of stroke onset, have not been thrombolysed and have no contraindications to EPO treatment. All groups will receive best usual treatment consisting of structured multidisciplinary rehabilitation on a stroke unit. In addition, participants in the second group will receive EPO 40,000 IU given intravenously at 1, 3 and 5 days and those in the third group will receive EPO 40,000 IU/ given intravenously at 7, 14, 21 days. The differences in recovery between the groups will be assessed at 30 and 90 days after randomisation by measuring clinical recovery in function and changes in the brain perfusion and structure using magnetic resonance (MR) imaging.

The research will tell us whether EPO treatment given early or late during stroke recovery has the potential to improve recovery in stroke patients who have not been thrombolysed. If EPO is shown to have the potential to influence brain repair, information from the study will be used to design larger definitive clinical trials for translation into clinical use in
35 years.

More details can be found here:

Ethics approval

NRES Committee London - Westminster,26 May 2011, ref:11/LO/0346

Study design

Randomised trial

Primary study design


Secondary study design

Randomised controlled trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use the contact details below to request a patient information sheet


Stroke Research Network


EPREX, Each patient will receive epoetin alfa (EPREX) 40,000 IU given intravenously over 5-10 minutes at 1, 3 and 5 days or 7, 14 and 21 days post stroke.

Intervention type



Phase IV

Drug names

Primary outcome measures

Change in Fugl-Meyer scale score from baseline

Secondary outcome measures

No secondary outcome measures

Overall trial start date


Overall trial end date


Reason abandoned


Participant inclusion criteria

1. Supratentorial ischaemic stroke, confirmed on imaging
2. Recruited within 48 hours of stroke onset. Time of onset is when symptoms began; for stroke that occurred during sleep, time of onset is when patient was last seen or was selfreported to be normal
3. NIHSS score 624 with NIHSS 1A (level of consciousness) score <2 at the time of enrolment
4. Reasonable expectation of availability to receive the full course of therapy, and to be available for subsequent follow-up visits
5. Reasonable expectation that patient will receive standard poststroke physical, occupational and speech therapy as indicated

Participant type


Age group




Target number of participants

UK Sample Size: 90

Participant exclusion criteria

1. Prestroke modified Rankin Score (mRS) >2
2. Thrombolytic treatment with tPA following the index stroke
3. Patients presenting with hemorrhagic and/or brain stem stroke
4. Women who may be pregnant or breastfeeding
5. Serum hemoglobin > 16 g/dL (males) or > 14 g/dL (females), or platelet count > 400,000/mm3
6. Advanced liver, kidney, cardiac or pulmonary disease (serum bilirubin > 1.5 x upper limit of normal (ULN), Alkaline phosphatase > 2.5 x ULN, GGT>2.5xULN
7. History of clotting disorders
8. Expected survival < 1 year
9. Allergy or other contraindication to erythropoeitin as per SPMC
10. A known diagnosis of cancer (except nonmalignant skin cancer)
11. A known diagnosis of epilepsy
12. Uncontrolled hypertension (BP persistently > 220 mm Hg systolic or 120 mm Hg diastolic despite antihypertensive therapy)
13. Preexisting and active major psychiatric or other chronic neurological disease
14. Currently participating in another investigational study

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

King's College Hospital NHS Trust
United Kingdom

Sponsor information


King's College Hospital NHS Foundation Trust (UK)

Sponsor details

Neonatal intensive care unit (NICU)
Denmark Hill
United Kingdom

Sponsor type

Hospital/treatment centre



Funder type


Funder name

National Institute for Health Research (NIHR) - Central Commissioning Facility (UK)

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Results - basic reporting

Publication summary

Publication citations

Additional files

Editorial Notes