The primary objective of this confirmatory study is to confirm the acid neutralisation action of Gaviscon Double Action Liquid versus placebo liquid, within the stomach.
ID
Source
Brief title
Acid neutralisation confirmatory pH monitoring study
Condition
- Other condition
- Gastrointestinal disorders
Synonym
Health condition
GORD
Research involving
Sponsors and support
Intervention
Outcome measures
Primary outcome
The primary endpoint will be the mean percentage of time that pH * 4 over 0-30
minutes post-dose across electrodes 5 to 10. The primary analysis will be the
comparison of this endpoint between Gaviscon Double Action Liquid and placebo
liquid.
Secondary outcome
The secondary endpoints are:
* The mean percentage of time that pH * 4 over the interval 30-60 minutes
post-dose across electrodes 5 to 10.
* The mean percentage of time that pH * 3 over the intervals 0-30 minutes and
30-60 minutes post-dose across electrodes 5 to 10.
* The mean percentage of time that pH * 3 and pH * 4 over the 10 minute
intervals post-dose across electrodes 5 to 10.
* The percentage of time that pH * 3 and pH * 4 over the 10 minute and 30
minute intervals at each electrode.
These endpoints will be compared between Gaviscon Double Action Liquid and
placebo.
The following will be displayed non-comparatively:
* The pH value measured every 4 seconds during each monitoring period at each
electrode.
Background summary
This confirmatory mode of action study is being conducted to characterise the
acid neutralisation activity of Gaviscon Double Action Liquid by comparing
antacid action with a liquid placebo. Data from this study will be used to
support claims for Gaviscon Double Action formulations.
Study objective
The primary objective of this confirmatory study is to confirm the acid
neutralisation action of Gaviscon Double Action Liquid versus placebo liquid,
within the stomach.
Study design
The study will be a randomised, single dose, crossover, open-label, placebo
controlled confirmatory study, to characterise the acid neutralisation activity
of Gaviscon Double Action Liquid (20 ml) in fasted healthy volunteers, using an
intragastric and oesophageal pH catheter.
Subjects, clinic staff and the consultant gastroenterologist, will remain
un-blinded to medications administered.
Intervention
Subjects will attend the Clinical Unit on four occasions over approximately 7
weeks (one pre-study screening visit [within 21 days prior to the first
treatment visit], two treatment visits [each including an overnight stay] and
one post-study follow-up visit [3-7 days after end of the second treatment
visit]). During each treatment period, subjects will stay in the Clinical Unit
from the evening prior to dosing until approximately 2 h after dosing. Doses
during treatment periods are separated by a minimum washout period of 5 days
and a maximum of 14 days.
Potential suitable subjects will be identified according to QPS standard
procedures. Written informed consent will be obtained prior to any pre-study
procedures.
Screening: The pre-study procedures will consist of medical history, physical
examination, concomitant medication vital signs, electrocardiogram (ECG),
haematology, clinical biochemistry, viral serology, serum pregnancy test for
female subjects, urinalysis, urinary drugs of abuse and alcohol breath test
assessments.
Treatment Periods (1 and 2): Subjects who fulfil all the pre-study eligibility
criteria will return to the Clinical Unit for the first treatment period, where
eligibility for entry onto the study will be confirmed. Upon entry into the
Clinical Unit on Day -1 of each treatment, concomitant medications will be
recorded, an alcohol breath test, urinary drugs of abuse test, urine pregnancy
test (female subjects), vital signs. Eligibility will be checked against the
inclusion/exclusion criteria. The subject will remain in the Clinical Unit
overnight.
On Day 1, eligible subjects will be randomised to one of the two treatments.
Fasted subjects will undergo nasal endoscopy, in order to locate the
Squamocolumnar Junction (SCJ) and will have the pH catheter inserted according
to the measurements obtained during the nasal endoscopy.
Following catheter insertion, the subjects will rest for at least 60 minutes.
Baseline pH readings will be taken every 4 seconds for 30 (up to 45) minutes to
enable the pH readings to stabilise. Any subject whose pH recordings do not
stabilise or who meet any of the withdrawal criteria will be withdrawn from the
study.
Each subject will be dosed with either Gaviscon Double Action Liquid or placebo
liquid and pH will be recorded for a further 65 minutes (+ 5 minutes) after
which the pH catheter will be removed via simple traction.
Within 30 minutes of catheter removal, the subject will be given a drink and
light snack after which the scheduling of Treatment Period 2 will be confirmed,
the subject will be provided with a *Volunteer Participation Card* and the
subjects may leave the Clinical Unit. Adverse Events will be solicited by
non-leading questions throughout the study.
During the stay in the Clinical Unit subjects will receive standardized meals,
and general/dietary restrictions will apply.
Post Study Follow-up Visit: The post-study follow-up visit will be conducted 3
to 7 days after the end of Treatment Period 2. Concomitant medication, physical
examination, vital signs, ECG, haematology, clinical biochemistry, urine
pregnancy test (for female subjects) and urinalysis will be recorded.
The total volume of blood drawn from each subject during the study will be
approximately 16 ml.
Study burden and risks
The potential risks to subjects taking part in the present study are considered
to be low. The adverse reactions that occur very rarely (<1/10,000) as a result
of taking sodium alginate products are allergic manifestations such as
urticaria or bronchospasm, anaphylactic or anaphylactoid reactions as a result
of a subject being sensitive to any of the active substances (sodium alginate,
sodium bicarbonate and calcium carbonate) or any of the excipients (e.g.
hydroxybenzoates [parabens]). Other adverse reactions include increased plasma
sodium levels especially for those with renal and cardiovascular conditions on
a highly restricted salt diet and high doses of calcium may cause alkalosis,
hypercalcaemia, acid rebound, milk alkali syndrome or constipation. However as
the subjects in this study are healthy volunteers and the subjects are
receiving only a single dose, the risk of these adverse reactions are
considered very low.
The nasal endoscopy, guide wire and catheter insertion/positioning involves
risks to the subjects including bleeding, perforation of the oesophagus,
stomach or duodenum and reactions to any drugs administered as part of the
procedure, such as local anaesthetics. In the GA1406 study, there were five
subjects who experienced nasal mucus blood tinged/nose bleeding/nasal pain,
which were related to the nasal endoscopy procedure, all of which were
resolved. The risk of this occurring is considered low.
Healthy volunteers are not expected to derive any benefit from participation in
the study, however through their participation in this trial they will provide
further clinical data to help characterise the antacid action of Gaviscon
Double Action Liquid. This will provide support for indications such
hyperacidity and excess stomach acid and will better inform consumers about the
action and potential benefits of sodium alginate formulations. For this reason,
the risk benefit balance for the current study is considered to be acceptable.
Dansom Lane -
Hull HU8 7DS
GB
Dansom Lane -
Hull HU8 7DS
GB
Listed location countries
Age
Inclusion criteria
Only subjects to whom all of the following conditions apply will be included:
1. Male or female subjects who have given written informed consent.
2. Age: * 18 years * 50 years.
3. Body Mass Index (BMI): * 18.5 and * 24.9.
4. Height * 1.90 metres
5. Healthy as determined by past medical history, physical examination, vital signs,
electrocardiogram, and laboratory tests at screening.
Exclusion criteria
excluded:
1. A history of gastro-oesophageal reflux or active gastrointestinal disease (gastroduodenal ulcer, gastrointestinal haemorrhage, mechanical obstruction or perforation) within the last year.
2. Clinically significant diseases of the body system.
3. A medical history that is associated with an increased risk in study procedures (e.g. basal skull fracture or those who have undergone trans-sphenoidal surgery).
4. Hospitalisation within the previous three months for major surgery or medical illness.
5. A clinically significant illness within the 4 weeks prior to screening.
6. Ingestion of any prescription medication or non-prescription medication within the seven days, prior to the screening visit, which the Principal Investigator considers may interfere with the study.
7. Ingestion of antacids, H2 antagonists, motility stimulants (e.g. prokinetics, macrolide antibiotics such as erythromycin and azithromycin, and 5-hydroxytryptamine [5HT] agonists such as sumatriptan) or other medicines for relief of symptoms of acid reflux disease 2 weeks prior to enrolment in the study and during the study and/or have taken proton pump inhibitors in the 4 weeks prior to enrolment into the study and during the study. Enrolment is defined as the date of informed consent signature.
8. Those who are currently taking any of the following medications: antihistamines, tetracyclines, digoxin, quinolones including fluoroquinolone, iron salts, neuroleptics, thyroxine and levothyroxine, penicillamine, beta-blockers (e.g. atenolol, metoprolol, propranolol), glucocorticoid, chloroquine, biphosphonates, ketoconazole, eltrombopag and Thiazide diuretics.
9. A history of drug hypersensitivity, which in the opinion of the Principal Investigator might interfere with the study.
10. A history of allergy or intolerance to either IMP or the following formulation constituents: e.g. sodium alginate, parabens (methyl and propyl), glucose syrup, carbomer, xanthan gum.
11. A current or recent history (within one year of the screening visit) of alcohol abuse or significant abuse/misuse of any legal or illegal drugs, substances and solvents.
12. Those with a positive screen/test for drugs of abuse and/or alcohol.
13. Those who regularly (weekly) consume excessive amounts of alcohol (> 8 units for men and > 6 units for women in one consumption, excessive amounts as defined by the UK National Office of Statistics).
14. Those who have consumed more than 2 units of alcohol per day in the 7 days prior to the screening visit and from the screening visit up to 48 hours before admission to the Clinical Unit for Treatment Period 1.
15. Those who have consumed alcohol within the 48 hours before admission to the Clinical Unit for Treatment Period 1 and there is insufficient time for the visit to be rescheduled.
16. Those who regularly consume excessive quantities of caffeine (> 6 cups of tea, coffee or cola per day), according to the Investigator*s judgement.
17. Those who have consumed caffeine-containing food and drinks within the 48 hours before admission to the Clinical Unit for Treatment Period 1 and there is insufficient time for the visit to be rescheduled.
18. Those who are either unable to refrain from using tobacco/nicotine during the study treatment periods or unable to smoke less than 6 cigarettes (or equivalent) per day.
19. Those with any clinically significant abnormal laboratory result, in the opinion of the Principal Investigator.
20. Known human immune deficiency virus (HIV) positive status, or a positive viral serology screen.
21. Female subjects of child bearing potential who are unwilling to use an effective method of contraception unless they are abstaining from sexual intercourse in line with the preferred and usual lifestyle of the subject, for the entire study duration. Effective forms of contraception and the definition of non-child bearing potential for the purpose of this study is defined within section 4.4.
22. Male subjects who are not willing to use an effective method of contraception for the entire study duration, unless anatomically sterile or where abstaining from sexual intercourse in line with the preferred and usual lifestyle of the subject (see section 4.4).
23. Females who are pregnant or lactating.
24. Those who are unable to communicate well with the Investigator (i.e. language or neurodevelopmental disorders) in the opinion of the Investigator.
25. Those previously randomised into this study.
26. Those who are an employee at the study site.
27. Those who are a partner or first-degree relative of the Investigator.
28. Those who have participated in a clinical study in the 12 weeks prior to the screening visit.
29. Those who have participated in 4 (or more) clinical studies in the 10 months prior to the screening visit.
30. Those who have donated more than 1.5 litres of blood in the 10 months prior to the screening visit
31. Those who are unable, in the opinion of the Investigator, to comply fully with the study requirements.
Design
Recruitment
Medical products/devices used
Followed up by the following (possibly more current) registration
No registrations found.
Other (possibly less up-to-date) registrations in this register
No registrations found.
In other registers
| Register | ID |
|---|---|
| EudraCT | EUCTR2016-000539-42-NL |
| CCMO | NL56645.056.16 |