Plain English Summary
Background and study aims
When someone has a stroke caused by bleeding into the brain (haemorrhagic stroke) permanent brain damage can occur and result in long-term disability. There is also a chance that the bleeding can increase, which may cause worse disability or be life threatening. This happens in approximately 20-30% of haemorrhagic stroke patients. At present there is no available treatment that is effective at reducing the bleeding in the brain and improving the recovery. In this trial, we want to test whether it is possible to give a drug (tranexamic acid) to people in the first few hours after a haemorrhagic stroke. We hope that we will be able to show that giving the drug may reduce the chances of dying and being left with disability after a haemorrhagic stroke. In this trial, the treatment we are testing is a drug, tranexamic acid, which encourages blood to clot to stop the bleeding. Continued or increased bleeding into the brain (haematoma expansion) is not uncommon in the first hours and days following a haemorrhagic stroke and increases the risk of the patient not recovering fully and being left with some disability. Stopping the bleeding in the first hours and days after stroke with medicine might help patients to recover better. Tranexamic acid is a tried and tested drug in other medical conditions that acts quickly to help the blood to clot and stop bleeding but is not given routinely after stroke. The aim of this study is to assess what effect tranexamic acid has on how people recover after a haemorrhagic stroke.
Who can participate?
Adults with an acute stroke caused by bleeding in the brain, within 8 hours of stroke onset. Participants will need to be able to complete all of the assessments, and will not have a diagnosis of another medical condition that is likely to interfere with the trial (e.g. terminal illness or pregnancy). Participants cannot be participating in other trials that are testing drugs.
What does the study involve?
Each participant's involvement in the study will last for 90 days. Participants will be randomly allocated to one of two treatments. Half of the participants will receive an injection of the drug tranexamic acid and the other half will have an injection of salt water as a dummy (placebo) treatment. The treatment (either tranexamic acid or dummy) will be given as an injection as soon as possible once participants have decided they wish to take part in the study. The treatment will be given via a drip over about 8 hours. The treatment will be given once, and then the treatment will stop. During the next 7 days a nurse will check the participants condition, looking in particular for signs of side effects of the treatment. A brain scan will also be repeated the day after the treatment to assess the effects of the treatment. The researchers will contact their GP or check with the NHS Information Centre to check on their condition 3 months after the stroke and to confirm contact details. Participants will then be contacted for a telephone consultation with a member of the research team. It will involve asking how they feel life has been affected by the stroke and some brief memory tests.
What are the possible benefits and risks of participating?
Because tranexamic acid is already routinely used in a number of bleeding conditions, we expect the potential benefit of the drug (stopping bleeding into the brain) to outweigh the low risk of serious side effects (such as blood clots). However, we do not know this for certain and will monitor all participants closely for side effects. Treatment with any drugs can result in possible side effects, but the side effects from tranexamic acid are generally mild. They can include diarrhoea, low blood pressure and dizziness. The drug can also sometimes affect colour vision but this is rare. However, because the treatment works by stopping bleeding there is a chance it can cause an increase in blood clot formation. This can occur in the legs (deep vein thrombosis, DVT) or the lungs (pulmonary embolism, PE) and is potentially very serious and maybe even life-threatening. In a very large study in 20,000 people with serious bleeding, tranexamic acid was safe and reduced the number of people dying from bleeding. There was no increase in serious side effects, such as blood clots, in the patients who were treated with tranexamic acid.
Where is the study run from?
The study is being run from the University of Nottingham but is a multi centre trial, with centres in Denmark, Georgia, Hungary, Italy, Malaysia, Poland, Republic of Ireland, Spain, Sweden, Switzerland, Turkey and the UK.
When is the study starting and how long is it expected to run for?
March 2013 to May 2018
Who is funding the study?
The National Institute of Health Research (NIHR) (UK)
Who is the main contact?
Dr Nikola Sprigg
HTA 11/129/109; 13467
Tranexamic acid for IntraCerebral Haemorrhage (TICH-2): a pragmatic phase III prospective double-blind randomised placebo-controlled trial
When someone has a stroke caused by bleeding into the brain (haemorrhagic stroke) permanent brain damage can occur and result in long-term disability. There is also a chance that the bleeding can increase, which may cause worse disability or be life threatening. At present there is no effective treatment available to reduce the bleeding in the brain and improve the recovery. New treatments are being developed to treat stroke, but it can be very hard to test whether they work in the first few hours because often patients take longer than this to get to hospital and have investigations such as brain scanning. Also some treatments are not suitable for all patients.
In this trial, the aim is to test whether it is possible to give tranexamic acid to patients in the first few hours after a haemorrhagic stroke and find out if it reduces the chances of dying and being left with disability.
Tranexamic acid encourages blood to clot to stop the bleeding. Continued or increased bleeding into the brain (called haematoma expansion) is not uncommon in the first hours and days following a haemorrhagic stroke and increases the risk of the patient not recovering fully and being left with some disability, or dying. Stopping the bleeding in the first hours after stroke with medications might help patients to recover better and reduce the number of patients who die.
The data will help doctors decide whether blood thickening treatments like tranexamic acid can be used in patients with acute haemorrhagic strokes to try and reduce death and disability and improve recovery.
Pilot study registered under ISRCTN50867461: http://www.isrctn.com/ISRCTN50867461
Approval was obtained in 2015 for a nested sub-study to investigate the role of Magnetic Resonance Imaging (MRI) scans in the diagnosis and assessment of patients with intracerebral haemorrhage. The objective of the MRI substudy is to determine the effects of tranexamic acid on the perihaematoma oedema, the presence of remote diffusion weighted imaging hyperintense lesions (DWIHL), and extent of end-stage tissue injury surrounding the haematoma cavity. The tertiary end points are:
1. Prevalence of remote DWIHL on Day 5 MRI scan
2. Perihaematoma oedema volume and perihaematoma diffusion restriction on Day 5 MRI scan
3. Combined volume of the residual haematoma cavity and surrounding gliosis on the Day 90 MRI scan
Planned recruitment was a subset of 280 patients recruited to the main TICH-2 study. The first patient was recruited in July 2015, recruitment closed 30/09/2017. The sub-study was funded by the British Heart Foundation (grant number PG/14/96/31262). The sub-study will close on 31/05/2018.
More details can be found at: http://www.nets.nihr.ac.uk/projects/hta/11129109
Protocol can be found at: http://www.nets.nihr.ac.uk/__data/assets/pdf_file/0008/81197/PRO-11-129-109.pdf
NRES Committee East Midlands - Nottingham 2, 23/11/2012, ref: 12/EM/0369
Pragmatic phase III prospective double-blind randomised placebo-controlled trial
Primary study design
Secondary study design
Randomised controlled trial
Patient information sheet
Copies of patient information sheets, consent forms and other trial related documents can be found at: http://tich-2.org/ShWrtq5IdxUu8LdpTzMfD2U3Uh4.php
Intravenous tranexamic acid: 1g loading dose given as 100 ml infusion over 10 minutes, followed by another 1g in 250 ml infused over 8 hours. Comparator matching placebo (normal saline 0.9%) administered by identical regimen.
Primary outcome measure
To assess whether tranexamic acid is safe and reduces death or dependency after primary intracerebral haemorrhage (PICH)
Death or dependency (ordinal shift on mRS) at day 90 will be analysed by intention-to-treat using ordinal logistic regression (OLR), with adjustment for minimisation factors. The assumption of proportional odds will be tested using the likelihood ratio test. Comparison of tranexamic acid versus control.
Secondary outcome measures
1. At day 7 (or discharge if sooner), neurological impairment (NIHSS)
2. At day 90, disability (Barthel index), Quality of Life (EuroQoL), cognition, cognition and mood (TICS and ZDS)
3. Safety: death, serious adverse events, thromboembolic events, seizures
4. Costs: length of stay in hospital, re-admission, institutionalisation
5. Radiological efficacy/safety (CT scan): change in haematoma volume from baseline to 24 hours, haematoma location, and new infarction
Overall trial start date
Overall trial end date
Reason abandoned (if study stopped)
Participant inclusion criteria
Adult (≥18 years, either sex) patients with acute primary intracerebral haemorrhage (PICH) within 8 hours of stroke onset (where stroke onset time is unknown, the time of when last known well will be used)
Target number of participants
Participant exclusion criteria
1. Patients with intracerebral haemorrhage secondary to anticoagulation, thrombolysis or known underlying structural abnormality such as arterial venous malformation, aneurysm, tumour, venous thrombosis as cause for the intracerebral haemorrhage. Note it is not necessary to exclude an underlying abnormality prior to enrolment, but where a secondary cause of haemorrhage is known, these patients should not be recruited.
2. Patients for whom tranexamic acid is thought to be contraindicated
3. Patients with premorbid dependency (mRS>4)
4. Participation in another drug trial concurrently
5. Prestroke life expectancy <3 months (e.g. advanced metastatic cancer)
6. Coma Glasgow coma scale <5
Recruitment start date
Recruitment end date
Countries of recruitment
Denmark, Georgia, Hungary, Ireland, Italy, Malaysia, Poland, Spain, Sweden, Switzerland, Turkey, United Kingdom
Trial participating centre
Trial participating centre
124 UK and international centres from 12 countries
Health Technology Assessment Programme, grant ref: 11/129/109
NIHR Health Technology Assessment Programme, HTA
Funding Body Type
Funding Body Subtype
Results and Publications
Publication and dissemination plan
1. The study protocol for the main study is available at: http://tich-2.org/ShWrtq5IdxUu8LdpTzMfD2U3Uh4.php
2. The statistical analysis plan and the protocol for the MRI sub-study have both been submitted for publication
3. A publication will be drafted in mid-March 2018 following the primary data analysis
4. Dissemination of the results will be via an oral presentation at the European stroke conference and publication in either NEJM or Lancet is planned for May 2018
IPD sharing statement
The data sharing plans for the current study are unknown and will be made available at a later date.
Intention to publish date
Participant level data
To be made available at a later date
Basic results (scientific)
1. 2016 protocol in: https://www.ncbi.nlm.nih.gov/pubmed/27048694
2. 2017 statistical analysis plan in: https://www.ncbi.nlm.nih.gov/pubmed/29262841
3. 2018 results in: https://www.ncbi.nlm.nih.gov/pubmed/29778325
4. 2018 sub-study statistical analysis plan in: https://www.ncbi.nlm.nih.gov/pubmed/29895329
5. 2018 sub-study protocol in: https://www.ncbi.nlm.nih.gov/pubmed/29431141
6. 2019 results in: https://www.ncbi.nlm.nih.gov/pubmed/31322116 (added 22/07/2019)