| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
| Severe Alcohol Use Disorder | 
 
 
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| E.1.1.1 | Medical condition in easily understood language  | 
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| E.1.1.2 | Therapeutic area  | Psychiatry and Psychology [F] - Mental Disorders [F03] | 
| MedDRA Classification | 
| E.1.2 Medical condition or disease under investigation | 
| E.1.2 | Version  | 21.0 | 
 
| E.1.2 | Level  | LLT | 
 
| E.1.2 | Classification code  | 10001585 | 
 
| E.1.2 | Term  | Alcohol abuse chronic | 
 
| E.1.2 | System Organ Class  | 100000004873 | 
 
 
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| E.1.3 | Condition being studied is a rare disease  |  No  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
1) To obtain preliminary data on whether ketamine is effective in promoting and prolonging abstinence in  patients with severe alcohol use disorder following detoxification. 
 
 
 2) To assess safety and tolerability of ketamine in severe alcohol use disorder. 
 
 | 
 
 
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| E.2.2 | Secondary objectives of the trial  | 
1) To make an early assessment on likely compliance to a combined ketamine and relapse prevention based psychological therapy 
 
 
 2) To obtain preliminary data as to whether ketamine alone is as effective as a combined ketamine and psychological therapy treatment.  
 
 | 
 
 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
18 - 60 years old 
 
 
 Meet either a) DSM-5 criteria for severe alcohol use disorder and b) DSM-IV criteria for alcohol dependence 
  
 
 Currently abstinent (breathlyser BAC level 0.02 and negative urine drug and alcohol screen) 
 
 
 Minimum of mild depression(>14 on Beck Depression Inventory-II)  
 
 
 Capacity to give informed consent as defined by GCP guidelines 
  
 
 Willing and able to wear a SCRAM-X bracelet for 6 months  
 
 
 Females of childbearing potential and males must be willing to use an effective method of contraception (hormonal or barrier method of birth control; abstinence) from the time consent is signed until 6 weeks after treatment discontinuation and inform the trial if pregnancy occurs 
 
 
 Females of childbearing potential must have a negative pregnancy test within 7 days prior to being registered for trial treatment and on day of first treatment. 
 
 | 
 
 
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| E.4 | Principal exclusion criteria | 
Currently taking any other relapse prevention medication or anti-depressants 
 
 
 Uncontrolled hypertension, systolic 140mm Hg or greater and diastolic 90mm Hg or greater 
 
 
 < 16 or > 35 BMI  
 
 
 History of psychosis, or in a first-degree relative; co-morbid current psychiatric diagnosis excluding depression as identified by DSM-5 or DSM-IV SCID 
  
 
 Previous or current diagnosis of substance dependence /  severe substance misuse disorder 
 
 
 History of neuropsychological difficulties 
 
 
 One or more previous confirmed seizures 
 
 
 Currently taking daily prescribed medication contraindicated in the Summary of Product Characteristics with ketamine: 
 Barbiturates and/or narcotics 
 Halogenated anaesthetics 
 Atracurium and tubocurarine 
 Central nervous system (CNS) depressants (e.g. phenothiazines, sedating H1 – blockers or skeletal muscle relaxants) 
 Anxiolytics, sedatives and hypnotics 
 Thiopental, thyroid hormones 
 Antihypertensive agents 
 Theophylline and methylxanthine 
 OR psychotropic drug use at screening assessment or during treatment weeks 
 
 
 Liver function tests > 3 times normal levels 
 
 
 Where there are "Special warnings or precautions for use" according to the Summary of Product Characteristics where risk vs benefit ratio is not in favour of giving ketamine, with assessment made by physical examination by medically qualified trial personnel, self-report or inspection of the medical notes: 
 Acute intermittent porphyria 
 Dehydration or hypovolemia 
 Hyperthyroidism, or patients receiving thyroid replacement 
 Pulmonary or upper respiratory tract infection 
 Severe Coronary artery disease, Cerebrovascular accident or cerebral trauma 
 Diabetes 
 Known glaucoma or globe injuries 
 Cirrhosis 
 Epilepsy 
 Neurological condition/brain damage 
 Intracranial mass lesions, presence of head injury or hydrocephalus 
 
 
 Suicidal ideation 
  
 
 Not willing to use effective contraception or (females) take pregnancy test 
  
 
 Allergic reaction to ketamine 
  
 
 > 10 previous detoxifications from alcohol 
 
 
 Pregnant or Breastfeeding 
 
 
 Allergies to excipients of Investigational Medicinal Product and placebo  
 
 
 Use of another investigational medicinal product that is likely to interfere with the study medication within 3 months of study enrolment | 
 
 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
| Relapse rates at 6 months and percentage days abstinent at 6 months, indexed by the SCRAM-X bracelet and patient reports on the time line follow back scale. | 
 
 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
| As an interim analysis with regarding to trial continuation, attrition among participants receiving ketamine only will be determined; the trial will be discontinued if more than 21/24 (88%) of participants who were randomised to ketamine are lost to follow-up at 3 months. Only aggregate data will be provided to the statistician at 3-month follow-up to ensure that treatment arm allocation will remain concealed. Due to the short duration of follow-up, no interim analyses for the primary or secondary outcomes are planned. From a safety perspective, adverse events will be monitored by the TSC and any concerns will be addressed. | 
 
 
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| E.5.2 | Secondary end point(s) | 
Number of days of continuous abstinence 3 months (SCRAM-X and Time-line follow back) 
 Percentage days abstinent at 3 months (SCRAM-X and timeline follow-back) 
 State mood (Profile of Mood states) 
 Depression (Beck Depression Inventory; Hamilton Depression Scale) 
 Anxiety (Speilberger Trait Anxiety Inventory) 
 Psychotic symptoms (Brief Psychiatric Rating Scale; Psychotomimetic States Inventory) 
 Cigarette smoking (Fagerstrom Smoking) 
 Craving (Visual Aanalogue Scales) 
 Quality of Life (SF-12) 
 Episodic Memory (Prose Recall) 
 Delay discounting 
 Response Inhibition (Stop Signal Reaction time) 
 Working Memory 
 Hippocampal Functioning (Pattern Recognition Test) 
 Adverse Effects (Adverse Effects VAS) | 
 
 
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| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| These endpoints will be evaluated following trial end when all patients have 6 month follow up data.  | 
 
 
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| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  No  | 
| E.6.3 | Therapy |  Yes  | 
| E.6.4 | Safety |  Yes  | 
| E.6.5 | Efficacy |  Yes  | 
| E.6.6 | Pharmacokinetic |  No  | 
| E.6.7 | Pharmacodynamic |  No  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  No  | 
| E.6.10 | Pharmacogenetic |  No  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  No  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  No  | 
| E.7.1.1 | First administration to humans |  No  | 
| E.7.1.2 | Bioequivalence study |  No  | 
| E.7.1.3 | Other |  No  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  Yes  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  No  | 
| E.7.4 | Therapeutic use (Phase IV) |  No  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  Yes  | 
| E.8.1.1 | Randomised |  Yes  | 
| E.8.1.2 | Open |  No  | 
| E.8.1.3 | Single blind |  No  | 
| E.8.1.4 | Double blind  |  Yes  | 
| E.8.1.5 | Parallel group |  Yes  | 
| E.8.1.6 | Cross over  |  No  | 
| E.8.1.7 | Other |  No  | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  No  | 
| E.8.2.2 | Placebo  |  Yes  | 
| E.8.2.3 | Other |  Yes  | 
| E.8.2.3.1 | Comparator description | 
| Saline (NaCl 0.9%, 50 mls solution) | 
 
 
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| E.8.2.4 | Number of treatment arms in the trial | 4 | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  No  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  Yes  | 
| E.8.4.1 | Number of sites anticipated in Member State concerned | 2 | 
| E.8.5 | The trial involves multiple Member States |  No  | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  No  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  No  | 
| E.8.7 | Trial has a data monitoring committee |  No  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
                     | 
| The end of the trial will be the last follow-up visit of the last participant at approximately 24 weeks post baseline.  | 
 
 
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| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 3 | 
| E.8.9.1 | In the Member State concerned months | 0 | 
| E.8.9.1 | In the Member State concerned days | 0 | 
| E.8.9.2 | In all countries concerned by the trial years | 3 | 
| E.8.9.2 | In all countries concerned by the trial months | 0 | 
| E.8.9.2 | In all countries concerned by the trial days | 0 |