A Phase 2/3 interventional study of Isosorbide Mononitrate XL (ISMN) and Cilostazol in Cerebral Small Vessel Diseases and Stroke, Lacunar, sponsored by University of Edinburgh. Completed at 1 site in United Kingdom. Open to participants aged 30 Years and older. Per ClinicalTrials.gov, last updated 2024-11-12.
Sponsored by University of Edinburgh · Phase 2/3, Interventional, and Prevention
About 35,000 people each year in the UK have a type of stroke, called 'lacunar' or 'small vessel' stroke, which is different to other common types of stroke and for which there is no proven treatment. It is thought that small vessel stroke is caused by damage to the lining of the tiny blood vessels deep inside the brain that stops them functioning normally. This not only causes stroke but, perhaps more importantly, causes problems with thinking and walking, possibly causing up to 45% of all dementias either on its own, or mixed with Alzheimer's disease (about 350,000 patients in the UK). Some drugs that are commonly used in other blood vessel diseases may help improve small vessel function and prevent worsening of brain damage. One drug (cilostazol) has been tested in patients with stroke in the Asia Pacific countries but not on dementia; the other drug (isosorbide mononitrate) is widely used in the UK for heart disease but not stroke. The investigators want to set up a clinical trial to test if the study methods are practical so that patients and trial centres can follow the procedures, and to confirm how many patients have more stroke-like symptoms or experience worsening of their thinking skills. This information is needed to be sure that a very large clinical trial to find out if these drugs can prevent worsening of small vessel disease will be possible.
A quarter of all ischaemic strokes (about 35000 per annum in the UK) are lacunar (small vessel) in type, mainly caused by an intrinsic, non-atheromatous, non-cardioembolic disease of the small deep perforating cerebral arterioles. More diffuse cerebral small vessel disease also causes up to 45% of dementias (350,000+ patients estimated currently in the UK), either alone or in association with Alzheimer's disease. There is no proven treatment for cerebral small vessel disease: conventional antiplatelet drugs may be ineffective or even hazardous, whilst antihypertensive treatment and statins may not have an effect. The disease mechanism is poorly understood but endothelial dysfunction, blood-brain barrier failure and vessel stiffness appear to contribute to the pathogenesis. Promising data available for licensed drugs with relevant modes of action, cilostazol (>6000 stroke patients in the Asia Pacific Region) and isosorbide mononitrate (ISMN, widely used in cardiac disease) support their testing in cerebral small vessel disease. This trial will be an Phase IIb preparatory to Phase III, randomised, partial factorial, open label, blinded end-point trial, testing cilostazol, ISMN, both, or neither, to assess the feasibility of recruitment, drug tolerability, trial procedures, safety and event rates in 400 patients recruited in UK stroke centres and followed-up to one year (primary endpoint). This trial is preparatory to a large, definitive, Phase III randomised controlled trial to prevent recurrent lacunar stroke and progressive small vessel disease-related physical and cognitive impairments after lacunar stroke.
21 studies on the registry are indexed under Stroke, Lacunar; 9 are open to participants now.
This study's enrollment of 363 is above the median of 60 across 15 interventional studies indexed under Stroke, Lacunar.
Browse Stroke, Lacunar studies →University of Edinburgh is the lead sponsor of 403 studies on the registry; 64 are open to participants now.
Compared within Stroke, Lacunar, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Cerebral Small Vessel Diseases. The counts are of registry records indexed under each term, refreshed daily. How we classify →
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Brain scanning* with MR including diffusion imaging wherever possible, and obtained soon after the presentation with stroke, shows either:
or, if only a CT brain scan is available2 as in section 3 above, then there is a small relevant (in age and location) subcortical infarct, or if no infarct then there is no competing pathology as a cause for stroke (e.g. no acute cortical infarct, no acute intra-cerebral haemorrhage, no stroke mimic such as tumour, subdural haematoma).
Note that the complete absence of any abnormality on MR or CT brain imaging (no acute subcortical infarct or pre-existing SVD such as white matter hyperintensities, lacunes, etc.) while occasionally seen in lacunar stroke is unusual and should question the diagnosis of lacunar ischaemic stroke.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Contraindication
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Platelets
Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Creatinine clearance (CrCl)
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Investigational drug or device
A drug or device being studied in a clinical trial.
It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Oral Isotard® 25mg XL (Isosorbide Mononitrate) tablets. Oral Isotard® 25mg XL: Day 1-5 / 25mg daily morning dose. Day 6 to week 52 / 50mg daily morning dose. Week 53 / 25mg daily morning dose. Week 54 / NIL dose. Or Oral Isosorbide mononitrate (ISMN) non-XL 20mg tablets: Day 1-5 / 20mg daily evening dose. Day 6 to week 52 / 20mg twice daily morning \& evening. Week 53 / 20mg daily morning dose. Week 54 / NIL dose.
Drug: Isosorbide Mononitrate XL (ISMN)
Oral Cilostazol 100mg tablets. Day 1-5 / 50mg daily evening dose. Day 6-10 / 50mg twice daily morning \& evening. Day 11-15 / 50mg daily morning dose \& 100mg daily evening dose. Day 16 to week 52 / 100mg twice daily morning \& evening. Week 53 / 50mg twice daily morning \& evening. Week 54 / NIL dose.
Drug: Cilostazol
Oral Isotard® 25 mg XL (ISMN) and oral Cilostazol 100mg tablets. Day 1-5 / ISMN - 25mg daily evening dose / Cilostazol - NIL. Day 6-10 / ISMN - 50mg daily morning dose and Cilostazol - NIL. Day 11-15 / ISMN - 50mg daily morning dose / Cilostazol - 50mg daily evening dose. Day 16-20 / ISMN - 50mg daily morning dose and Cilostazol - 50mg twice daily morning \& evening. Day 21-25 / ISMN - 50mg daily morning dose and Cilostazol - twice daily, 50mg morning \& 100mg evening dose. Day 26-30 ISMN - 50mg daily morning dose and Cilostazol 100mg - twice daily morning \& evening. Day 30 to week 52 / ISMN 50mg morning dose and Cilostazol 100mg - twice daily morning \& evening. Week 53 / ISMN 25mg daily morning dose and Cilostazol 50mg twice daily morning \& evening. Week 54 / NIL dose
Drug: ISMN XL and Cilostazol
Neither isosorbide mononitrate nor Cilostazol is administered for the entire duration of the study.
Other: Neither ISMN nor cilostazol
Isosorbide mononitrate (ISMN), is an NO donating organic nitrate that enhances vasodilation, is widely used in ischaemic heart disease, and has no antiplatelet activity.
Also known as: Isosorbide mononitrate non-XL (ISMN)
Cilostazol is a phosphodiesterase 3-inhibitor (PDE3-inhibitor) that enhances the PGI2-cAMP system. It has weak antiplatelet effects (so low bleeding risk), reduces infarct size and reduces ageing-related decline in myelin repair in experimental models.
Cilostazol is a phosphodiesterase 3-inhibitor (PDE3-inhibitor) that enhances the PGI2-cAMP system. It has weak antiplatelet effects (so low bleeding risk), reduces infarct size and reduces ageing-related decline in myelin repair in experimental models. Isosorbide mononitrate (ISMN), is an NO donating organic nitrate that enhances vasodilation, is widely used in ischaemic heart disease, and has no antiplatelet activity.
Also known as: isosorbide mononitrate non-XL and cilostazol
Neither isosorbide mononitrate nor Cilostazol administered for the entire duration of the study.
Feasibility of Phase III Trial
Feasibility of Phase III trial, i.e. that eligible patients can be identified correctly, in sufficient numbers, enrolled and \>95% retained in follow-up at one year, to achieve feasibility target sample size recruitment and randomisation of 400 patients in 24 months in the UK.
Time frame: 36 months (24 Months Recruitment + 12 months Follow Up)
Trial Medication Tolerability Measured by Number of Participants With Adherence to Medication at Half Dose or More at 1 Year
It is estimated that in this trial 75% of patients will be able to tolerate trial medication, in at least half dose, up to one year after randomisation (i.e. less than 25% will stop trial medication completely through inability to tolerate the drugs).
Time frame: 12 months
Incidence of Treatment Emergent Adverse Effects [Safety]
Safety - symptoms of systemic or intracranial bleeding, recurrent cerebral and systemic vascular events, and vascular and non-vascular causes of death will be collected. It is estimated that in this trial the absolute risk of death, including fatal haemorrhage, will not differ significantly (ie fall outside the upper 95% CI) from 2% per year on trial drugs versus no trial drugs, when given in addition to guideline drugs; and will not increase bleeding or ischaemic SVD lesions significantly (at the p\<0.01 level) on MRI.
Time frame: 12 months
Treatment Efficacy - Percentage of Participants Experiencing an Event (Stroke, TIA, Myocardial Ischaemia, Cognitive Impairment and Dementia)
It is estimated that in this trial the combined rate of recurrent stroke, MI, death, cognitive impairment and dependency will be 40-50% at one year after enrolment in order to detect modest but clinically-important reductions in poor outcomes. The study has a 2x2 partial factorial design. This allows testing of both drugs when given alone and together. Participants were allocated into one of four treatment groups. However, as some participants were in a group which received both treatments simultaneously then the subgroups reported for IMP exposure include a count of both participants from the single and the combined treatment groups as the total number exposed to that IMP
Time frame: 12 months
| Milestone | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol |
|---|---|---|---|---|
| Started | 90 | 91 | 91 | 91 |
| Completed | 90 | 91 | 91 | 91 |
| Not completed | 0 | 0 | 0 | 0 |
| Milestone | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol |
|---|---|---|---|---|
| Started | 181 | 182 | 91 | 91 |
| Completed | 181 | 182 | 91 | 91 |
| Not completed | 0 | 0 | 0 | 0 |
| Milestone | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol |
|---|---|---|---|---|
| Started | 90 | 91 | 91 | 91 |
| Completed | 70 | 70 | 81 | 87 |
| Not completed | 20 | 21 | 10 | 4 |
Feasibility of Phase III trial, i.e. that eligible patients can be identified correctly, in sufficient numbers, enrolled and \>95% retained in follow-up at one year, to achieve feasibility target sample size recruitment and randomisation of 400 patients in 24 months in the UK.
| Participants | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol |
|---|---|---|---|---|
| Feasibility of Phase III Trial | 20 | 21 | 10 | 4 |
It is estimated that in this trial 75% of patients will be able to tolerate trial medication, in at least half dose, up to one year after randomisation (i.e. less than 25% will stop trial medication completely through inability to tolerate the drugs).
| Participants | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol |
|---|---|---|---|
| Trial Medication Tolerability Measured by Number of Participants With Adherence to Medication at Half Dose or More at 1 Year | 59 | 48 | 45 |
Safety - symptoms of systemic or intracranial bleeding, recurrent cerebral and systemic vascular events, and vascular and non-vascular causes of death will be collected. It is estimated that in this trial the absolute risk of death, including fatal haemorrhage, will not differ significantly (ie fall outside the upper 95% CI) from 2% per year on trial drugs versus no trial drugs, when given in addition to guideline drugs; and will not increase bleeding or ischaemic SVD lesions significantly (at the p\<0.01 level) on MRI.
| Participants | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol |
|---|---|---|---|---|
| Incidence of Treatment Emergent Adverse Effects [Safety] | 1 | 2 | 0 | 1 |
It is estimated that in this trial the combined rate of recurrent stroke, MI, death, cognitive impairment and dependency will be 40-50% at one year after enrolment in order to detect modest but clinically-important reductions in poor outcomes. The study has a 2x2 partial factorial design. This allows testing of both drugs when given alone and together. Participants were allocated into one of four treatment groups. However, as some participants were in a group which received both treatments simultaneously then the subgroups reported for IMP exposure include a count of both participants from the single and the combined treatment groups as the total number exposed to that IMP
| Participants | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol |
|---|---|---|---|---|
| Treatment Efficacy - Percentage of Participants Experiencing an Event (Stroke, TIA, Myocardial Ischaemia, Cognitive Impairment and Dementia) | 80 | 84 | 36 | 55 |
Collected over From randomisation to 12 months.. Non-serious events are listed at a 0% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| Isosorbide Mononitrate XL (ISMN) | 1/181 (0.6%) | 21/181 (11.6%) | — |
| Cilostazol | 1/182 (0.5%) | 29/182 (15.9%) | — |
| ISMN XL and Cilostazol | 0/91 (0%) | 15/91 (16.5%) | — |
| Neither ISMN Nor Cilostazol | 1/91 (1.1%) | 12/91 (13.2%) | — |
| Event | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol |
|---|---|---|---|---|
| GastrointestinalGastrointestinal disorders | 7/181 | 8/182 | 5/91 | 1/91 |
| OtherGeneral disorders | 5/181 | 6/182 | 3/91 | 4/91 |
| CardiovascularCardiac disorders | 5/181 | 7/182 | 4/91 | 2/91 |
| GenitourinaryRenal and urinary disorders | 1/181 | 4/182 | 1/91 | 1/91 |
| Infection/sepsisInfections and infestations | 2/181 | 4/182 | 2/91 | 1/91 |
| Tumour/ malignancyNeoplasms benign, malignant and unspecified (incl cysts and polyps) | 1/181 | 4/182 | 1/91 | 1/91 |
| RespiratoryRespiratory, thoracic and mediastinal disorders | 1/181 | 2/182 | 1/91 | 1/91 |
| HaematologicalBlood and lymphatic system disorders | 1/181 | 0/182 | 0/91 | 1/91 |
| MusculoskeletalMusculoskeletal and connective tissue disorders | 1/181 | 1/182 | 0/91 | 0/91 |
| Metabolic/EndocrineMetabolism and nutrition disorders | 0/181 | 0/182 | 0/91 | 0/91 |
| Age, Continuous(years) | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol | Total |
|---|---|---|---|---|---|
| Median | 65 (56 to 72) | 64 (57 to 73) | 63 (56 to 72) | 64 (57 to 74) | 64 (56 to 72) |
| Sex: Female, Male(Participants) | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol | Total |
|---|---|---|---|---|---|
| Female | 27 | 28 | 27 | 30 | 112 |
| Male | 63 | 63 | 64 | 61 | 251 |
| Race and Ethnicity Not Collected(Participants) | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol | Total |
|---|---|---|---|---|---|
| Count of participants | — | — | — | — | 0 |
| Stroke onset to randomisation, days(days) | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol | Total |
|---|---|---|---|---|---|
| Mean | 223.8 ± 409.8 | 217.8 ± 456.7 | 263.9 ± 614.7 | 192.9 ± 270.3 | 224.6 ± 453.8 |
| Stroke onset to randomisation <=100 days(Participants) | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol | Total |
|---|---|---|---|---|---|
| Count of participants | 54 | 53 | 46 | 53 | 206 |
| Highest education level - postgraduate(Participants) | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol | Total |
|---|---|---|---|---|---|
| Count of participants | 5 | 6 | 10 | 6 | 27 |
| Highest education level - undergraduate(Participants) | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol | Total |
|---|---|---|---|---|---|
| Count of participants | 8 | 9 | 9 | 11 | 37 |
| Highest education level - A Level or Equivalent(Participants) | Isosorbide Mononitrate XL (ISMN) | Cilostazol | ISMN XL and Cilostazol | Neither ISMN Nor Cilostazol | Total |
|---|---|---|---|---|---|
| Count of participants | 8 | 14 | 14 | 18 | 54 |
4 further baseline measures are reported on the registry.
PDFs hosted by the registry, ClinicalTrials.gov.
Plan to share: No
Ran from Jan 2018 to primary completion in May 2022, 52 months.
Results were first posted in Nov 2024, 2 years 5 months after primary completion.
How these figures are worked out, and which studies are left out of them.
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Studies of the drugs tested here: Isosorbide mononitrate · Cilostazol