| E.1 Medical condition or disease under investigation |
| E.1.1 | Medical condition(s) being investigated |
|
| MedDRA Classification |
| E.1.2 Medical condition or disease under investigation |
| E.1.2 | Version | 2.2 |
| E.1.2 | Level | LLT |
| E.1.2 | Classification code | 10033295 |
| E.1.2 | Term | Overdose |
|
| E.1.2 Medical condition or disease under investigation |
| E.1.2 | Version | 2.2 |
| E.1.2 | Level | LLT |
| E.1.2 | Classification code | 10033297 |
| E.1.2 | Term | accidental overdose |
|
| 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 |
| To determine whether pre-treatment with intravenous ondansetron 4 mg will reduce the occurrence of vomiting and retching in paracetamol poisoned patients receiving intravenous acetylcysteine. |
|
| E.2.2 | Secondary objectives of the trial |
· To determine whether pre-treatment with intravenous ondansetron 4 mg will reduce the occurrence of nausea in paracetamol poisoned patients receiving intravenous acetylcysteine. ·To compare the incidence of nausea or vomiting in the modified and conventional acetylcysteine regimens in paracetamol poisoned patients.
Additional data will be collected to inform the design of future clinical studies: ·To compare the incidence of anaphylactoid reactions in the modified and conventional acetylcysteine regimens in paracetamol poisoned patients. ·To determine the rate of occurrence of hepatotoxicity (defined by raised biochemical markers) in patients treated with the modified and conventional acetylcysteine administration regimens. ·To determine the occurrence of hepatotoxicity as determined at the end of the conventional acetylcysteine administration regimen and at 12h after administration. ·To measure length of hospital stay in patients receiving modified and conventional acety |
|
| E.2.3 | Trial contains a sub-study | Yes |
| E.2.3.1 | Full title, date and version of each sub-study and their related objectives |
Pharmacokinetic study of modified 12h v conventional 20.25h acetylcysteine regimen. In a subset of 40 patients, plasma acetylcysteine concentrations as well as biomarkers of paracetamol toxicity and inflammatory response, will be measured at 5 timepoints-0, 15min, 2h, 20.25h (end of infusion) and a 5th sample at either 4h or 12h depending on time of randomisation. In the case of acetylcysteine measurement, blood samples are relatively unstable, and will therefore need to be obtained during daylight hours. |
|
| E.3 | Principal inclusion criteria |
1. Admission to hospital within 24h of a single acute paracetamol overdose. 2. Requirement for treatment with acetylcysteine based on the following clinical criteria: These include a) patients with no risk factors and timed paracetamol concentrations on or above the “200-line” on the standard treatment nomogram b) patients with at least 1 risk factor and timed paracetamol concentrations above the “100-line” on the standard treatment nomogram 3)Patients presenting >8h and at risk of liver damage based on history of dose ingested that need immediate treatment. Risk factors are defined as follows: Nutritional deficiency, malnourished and/or debilitating disease: acute or chronic starvation, eating disorders, cachexia, malabsorption syndromes, AIDS, cystic fibrosis, hepatitis C, chronic alcoholism.
Enzyme induction: use of drugs with this property (carbamazepine, rifampicin, barbiturates, phenytoin, rifabutin, efavirenz, nevirapine, ST John's wort); regular consumption of ethanol above advised amounts. |
|
| E.4 | Principal exclusion criteria |
Patients who : present >24 hours after a single acute PCM overdose are <16 years old are detained under the Mental Health Act have a known permanent cognitive impairment have a life-threatening illness are known to be pregnant have previously participated in the study have an unreliable history of paracetamol overdose have vomited and require treatment with an antiemetic prior to randomisation present after taking a staggered paracetamol overdose (defined as when the overdose of paracetamol is taken over a period of more than 1 hour) take anticoagulants (e.g warfarin) therapeutically or have taken an overdose of anticoagulants in the opinion of the responsible clinician/nurse, are unlikely to complete the full course of acetylcysteine e.g. expressing wish to self-discharge in the opinion of the responsible clinician/nurse are unable to complete the initial questionnaire either themselves or with assistance have a history of hypersensitivity to ondansetron or other 5HT3 receptor antagonists Non-English speaking patients (trial information will only be produced in English in view of the known demographics of the Edinburgh and Newcastle self-harm population.) |
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| E.5 End points |
| E.5.1 | Primary end point(s) |
| Proportion of patients with complete control of vomiting or retching as defined by no vomiting episodes or retching and no use of rescue anti-emetic medication. |
|
| 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 | Yes |
| E.6.7 | Pharmacodynamic | Yes |
| 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 | Yes |
| E.6.13.1 | Other scope of the trial description |
|
| E.7 | Trial type and phase |
| E.7.1 | Human pharmacology (Phase I) | No |
| E.7.1.1 | First administration to humans | Information not present in EudraCT |
| E.7.1.2 | Bioequivalence study | Information not present in EudraCT |
| E.7.1.3 | Other | Information not present in EudraCT |
| E.7.1.3.1 | Other trial type description | |
| E.7.2 | Therapeutic exploratory (Phase II) | No |
| E.7.3 | Therapeutic confirmatory (Phase III) | No |
| E.7.4 | Therapeutic use (Phase IV) | Yes |
| 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 | Yes |
| 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 | Yes |
| E.8.1.7.1 | Other trial design description |
| ondansetron double blind acetylcysteine single blind factorial design |
|
| E.8.2 | Comparator of controlled trial |
| E.8.2.1 | Other medicinal product(s) | Yes |
| E.8.2.2 | Placebo | Yes |
| E.8.2.3 | Other | No |
| 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 | Information not present in EudraCT |
| E.8.7 | Trial has a data monitoring committee | Yes |
| 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 trial will be complete when 250 patients have been recruited and 200 completed the study. |
|
| E.8.9 Initial estimate of the duration of the trial |
| E.8.9.1 | In the Member State concerned years | 1 |
| E.8.9.1 | In the Member State concerned months | 6 |
| E.8.9.1 | In the Member State concerned days | 0 |
| E.8.9.2 | In all countries concerned by the trial years | 1 |
| E.8.9.2 | In all countries concerned by the trial months | 6 |
| E.8.9.2 | In all countries concerned by the trial days | 0 |