GastroparesisPhase 2AZINCT01323582
Comparison of Two Macrolides, Azithromycin and Erythromycin, for Symptomatic Treatment of Gastroparesis
A Phase 2 study testing Erythromycin and Azithromycin in people with Gastroparesis, run by University of Florida at 1 site in United States.
Trial summary
Erythromycin is effectively used in the treatment of Gastroparesis (GP) patients. In susceptible patients however, it has been associated with sudden cardiac death due to prolongation of QT intervals and subsequent cardiac risks through its interaction some other drugs. Read more about this study
- Who is it for?
- Ages 18 to 65 years
- Conditions the study is for
- Gastroparesis
- What is being tested?
- Erythromycin and Azithromycin
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 26 participants
- Where
- 1 siteUnited States
- Study dates
- Feb 2009to Dec 2012
- Phase
- Phase 2
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 65 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- presenting to gastroenterology motility specialty clinics at the University of Florida (UF), who meet the clinical and radiologic diagnostic criteria for diagnosis of GP
Who cannot join
- Any history of mechanical obstruction
- Gastrointestinal malignancy
- Current use of prokinetics such as cisapride, pimozide, or anticholinergic medication which cannot be discontinued 72 hrs prior to study
- Abnormal upper endoscopy with finding of erosions or ulcerations
- Helicobacter pylori infection in past 6 months
- Recent abdominal surgery < 6 months
Show all 17Show fewer
- Cardiac history with EKG finding of QTC > 450 done on a screening test
- Detected renal or hepatic dysfunction described as a GFR <10 ml/min and ALT/AST values > 2 times the normal level in our laboratory
- Allergy to macrolide antibiotics
- Psychiatric history other than anxiety or depression
- Predominant symptoms of irritable bowel syndrome such as constipation or diarrhea
- Uncontrolled diabetes with fasting blood glucose levels > 180 mg/dL, due to effect of hyperglycemia on gastric emptying. For patients with diabetes, blood glucose levels will be recorded in a patient diary.
- Pregnant or nursing females
- Any history of myasthenia gravis
- Current use of Coumadin, lovastatin, simvastatin Nelfinavir, theophylline, digoxin, ergotamine/dihydroergotamine products, benzodiazepines, and sildenafil (this will be discontinued for the duration of the clinical trial if subject is on this medication).
- History of elevated liver function studies or CPKs.
- Pregnancy : A urine pregnancy test will be performed at the beginning of each treatment period and only subjects who are not pregnant will be enrolled for the study.
Trial locations and contacts
1 site in 1 country.
About this study
Erythromycin is effectively used in the treatment of Gastroparesis (GP) patients. In susceptible patients however, it has been associated with sudden cardiac death due to prolongation of QT intervals and subsequent cardiac risks through its interaction some other drugs. Azithromycin (AZI) is a macrolide antibiotic but does not have the mentioned druf interactions , has fewer gastrointestinal side effects, and fewer risks of QT prolongation and cardiac arrhythmias. Consequently, AZI avoids drawbacks of dosing with erythromycin and may be preferred as a prokinetic agent in patients on other concomitant medications.
We hope to demonstrate the effectiveness of Azithromycin (AZI) as compared to Erythromycin in the treatment of Gastroparesis (GP), and later, form the framework for larger randomized-controlled parallel studies to investigate use of AZI for treatment of GP.
Our novel hypothesis is to determine whether AZI can be used to treat GP.
Read the detailed description
Gastroparesis (GP) is a chronic gastrointestinal motility disorder resulting from delayed transit of gastric contents from the stomach into the duodenum in the absence of mechanical outlet obstruction. The symptoms of GP are variable but include early satiety, bloating, nausea, vomiting, and epigastric abdominal pain. Although the true prevalence of the disorder is unknown, symptoms suggestive of GP are present in 7-15% of the population with an estimated one-third of diabetic patients in tertiary care settings having abnormal gastric emptying studies. Yet, despite the significant healthcare and economic costs due to frequent hospitalization in these patients, treatment of GP is difficult due to the lack of available treatment options and the often potential side effects of available prokinetic agents, including cardiac side effects such as QT prolongation, sudden cardiac death, and torsade de pointes.
One such medication used for treatment of GP is erythromycin. Erythromycin has its drawbacks. Several reports of cardiac arrhythmias associated with use of either oral or intravenous (IV) Erythromycin have been reported. This finding sparked our interest in another macrolide, Azithromycin (AZI), which does not have the drug-drug interactions as seen with erythromycin and is not metabolized by the CYP3A inhibitors, therefore having fewer cardiac side effects.
In This study our primary goal is to determine whether AZI can be used to treat GP.
- Conditions
- Gastroparesis
- Being tested
- Erythromycin, Azithromycin
- Keywords
- Gastroparesis, Gastroparesis Treatment, Gastric Emptying, Prokinetic Agents, Macrolides, Erythromycin, Azithromycin, Erythromycin Cardiac Side-effects, Erythromycin drug interactions, AZI
- Medical subject headings
- Gastroparesis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
ErythromycinDrug
Also called Erythromycin ethylsuccinate
200mg/5ml elixir administered orally three times a day half an hour prior to meals.
AzithromycinDrug
The dose of Azithromycin given was determined based on the following study on 10 healthy subjects. In random order, each of ten healthy subjects underwent OBT studies following administration of AZI, at doses of 50mg, 100mg, and 133mg. The T½ and Tlag was then compared for the three doses by a randomized block analysis using Analysis of Variance followed by Tukey's multiple comparison. Results: The T½ for each of the respective doses of AZI (50mg, 100mg, and 133mg) was 129 ± 27, 128 ± 31, and 128 ± 16 minutes (p = 0.98). This data suggested that AZI at doses of 50mg, 100mg and 133 mg have fairly similar activity in its effects on gastric emptying in healthy subjects. Based on this analysis , we decided to use a dose of 50 mg/5 ml for administered TID prior to meals.
| Study group | Role | What they receive |
|---|---|---|
| erythromycin | Active comparator | 200mg/5ml elixir administered orally three times a day half an hour prior to meals. Receives: Drug: Erythromycin |
| Azithromycin | Experimental | The dose of Azithromycin was determined based on our dose response curve obtained on 10 healthy subjects who were given three different doses of Azithromycin, 50 mg, 100 mg and 133 mg and underwent breath testing to determine the gastric emptying half-time. These doses were determined based on a maximum safe dosage per day of Azithromycin of 400 mg given the medication would then be administered three times daily before meals. The appearance of the medication (azithromycin) and administration period was then identical to that of Erythromycin, i.e. 5ml elixir administered orally three times a day half an hour prior to meals. The total daily dosage of Azithromycin was determined after obtaining the dose- response analysis. Receives: Drug: Azithromycin |
What is being measured
The primary outcome is the main question the study is designed to answer.
Time in Minutes for 50% of the Ingested Meal to Empty the Stomach With a Standardized Breath Test: Half the of the Week 11 Value (Period 2) Less Half the of the Week 4 Value (Period 1). This Estimates the Effect Size.
Patients will be given a standardized meal enriched with a labeled material and the breath samples are then collected and analyzed. The estimated time to empty 50% (t 1/2) of the accumulated contents is recorded. Because the difference is RX-B -RX A in one group and RX A -RX B in the other, the difference between these two estimates twice the effect size. Hence the Half is applied, as is standard in the two sample method for crossover studies.
Measured: Weeks 4 and 11 (end of periods)
Gastroparesis Cardinal Symptom Index (GCSI) Score
This is a Validated instrument for measuring symptom severity in patients with gastroparesis. This scoring is based on a Likert Scale from (0-5) with zero being no symptoms and five being very severe symptoms on 9 subscales, making the overall score range from 0-45. The higher the score, the more severe patient's symptoms.
Reference for GCSI: Revicki DA, REntz AM, Dubois D, et al. Development and validation of a patient-assessed gastroparesis symptoms severity measure: the Gastroparesis Cardinal Symptom Index. Ailment Pharm Ther 2003; 18: 141:50.
Because the difference is RX-B -RX A in one group and RX A -RX B in the other, the difference between these two estimates twice the effect size. Hence the Half is applied, as is standard in the two sample method for crossover studies.
Measured: Weeks 4 and 11 (end of periods)
Secondary outcomes (6)
NDI Score
Nepean Dyspepsia Index (NDI) is a measure of symptom status and quality of life in functional dyspepsia. This scale is scored using each subscale (Tension, interference with daily activities), Eating/drinking, Knowledge/control, work/study) and adding up the items for each of the five subscale score (2-10). Total score range would be 10-50).
For the NDI, a lower number is better meaning the symptom is not effecting quality of life and a higher score closer to 50 is worse meaning it is effecting patients quality of life.
Reference: Talley NJ, Verlinden M, Jones M. Quality of life in functional dyspepsia: responsiveness of the Nepean Dyspepsia Index and developement of a new 10-iten short form. Aliment Pharmacol Ther 2001: 15: 207-216.
Because the difference is RX-B -RX A in one group and RX A -RX B in the other, the difference between these two estimates twice the effect size. Hence the Half is applied, as is standard in the two sample method for crossover studies.
Measured: Weeks 4 and 11 (end of periods)
TLAG (Time From Ingestion of Meal to Start of Gastric Emptying)
This is defined as the time from ingestion of the meal to the beginning of the emptying process in minutes. Because the difference is RX-B -RX A in one group and RX A -RX B in the other, the difference between these two estimates twice the effect size. Hence the Half is applied, as is standard in the two sample method for crossover studies.
Measured: Weeks 4 and 11 (end of periods)
Change in Time to 50% Gastric Emptying: Post Test Less Baseline Pooled Over Orderings
Patients will be given a standardized meal enriched with a labeled material and the breath samples are then collected and analyzed. The estimated time to reaching 50% of the accumulated contents is recorded.
Measured: Baseline and end of treatment period
Change in Time to 50% Emptying: Post Test Less Baseline Pooled Over Orderings
Patients will be given a standardized meal enriched with a labeled material and the breath samples are then collected and analyzed. The estimated time to reaching 50% of the accumulated contents is recorded.
Measured: at baseline before initiation of the treatment and after completion of each treatment period.
Gastroparesis Cardinal Symptom Index (GCSI) Score Change From Baseline to Post Treatment
This is a Validated instrument for measuring symptom severity in patients with gastroparesis. This scoring is based on a Likert Scale from (0-5) with zero being no symptom and five being very severe symptoms on 9 subscales, making the overall score range from 0-45. The higher the score, the more severe patient's symptoms are. The scale is reported in the references. The change was calculated by measuring the end of treatment minus baseline GCSI score.
Negative value reflects this change.
Measured: Baseline and end of treatment period
Does GCSI Score Improve (Lower) on Treatment, Pooling the AZ Patients Over Their Treatment Periods? Endpoint is Difference in Post-test Less Baseline
This is a Validated instrument for measuring symptom severity in patients with gastroparesis. This scoring is based on a Likert Scale from (0-5) with zero being no symptom and five being very severe symptoms on 9 subscales, making the overall score range from 0-45. The higher the score, the more severe patient's symptoms are. The scale is reported in the references.
This is a calculation taken with GCSI score at end of treatment minus baseline. Negative value reflects this change.
Measured: Baseline and end of treatment period
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted25 Mar 2011 (estimated)
- Study startFeb 2009
- Primary completionDec 2012
- Study completionDec 2012
Why it stopped: Original investigator left this institution, replacement investigator retired.
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Publications (15)Papers the sponsor has linked to this study.
- Other trials for GastroparesisStudies of the same condition, open and under way.
- More trials run by University of FloridaThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Double blind
- Who is masked
- Participant, Investigator
- Enrolment
- 26 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Florida
- Sponsor type
- University, hospital or other
- Collaborators
- Metabolic Solutions Inc.
- Responsible party
- Sponsor
- Investigators
- Baharak Moshiree, MD, Principal investigator, University of Florida
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01323582
- Sponsor's protocol ID
- 645-2008
- Acronym
- AZI
- Status last verified
- Dec 2014
- First submitted
- 24 Mar 2011
- Last updated
- 5 Dec 2014
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
Publications
Ray WA, Murray KT, Meredith S, Narasimhulu SS, Hall K, Stein CM. Oral erythromycin and the risk of sudden death from cardiac causes. N Engl J Med. 2004 Sep 9;351(11):1089-96. doi: 10.1056/NEJMoa040582.
PubMed 15356306Frank L, Kleinman L, Ganoczy D, McQuaid K, Sloan S, Eggleston A, Tougas G, Farup C. Upper gastrointestinal symptoms in North America: prevalence and relationship to healthcare utilization and quality of life. Dig Dis Sci. 2000 Apr;45(4):809-18. doi: 10.1023/a:1005468332122.
PubMed 10759254Talley NJ, Locke GR 3rd, Lahr BD, Zinsmeister AR, Tougas G, Ligozio G, Rojavin MA, Tack J. Functional dyspepsia, delayed gastric emptying, and impaired quality of life. Gut. 2006 Jul;55(7):933-9. doi: 10.1136/gut.2005.078634. Epub 2005 Dec 1.
PubMed 16322108Soykan I, Sivri B, Sarosiek I, Kiernan B, McCallum RW. Demography, clinical characteristics, psychological and abuse profiles, treatment, and long-term follow-up of patients with gastroparesis. Dig Dis Sci. 1998 Nov;43(11):2398-404. doi: 10.1023/a:1026665728213.
PubMed 9824125Wisialowski T, Crimin K, Engtrakul J, O'Donnell J, Fermini B, Fossa AA. Differentiation of arrhythmia risk of the antibacterials moxifloxacin, erythromycin, and telithromycin based on analysis of monophasic action potential duration alternans and cardiac instability. J Pharmacol Exp Ther. 2006 Jul;318(1):352-9. doi: 10.1124/jpet.106.101881. Epub 2006 Apr 13.
PubMed 16614168Milberg P, Eckardt L, Bruns HJ, Biertz J, Ramtin S, Reinsch N, Fleischer D, Kirchhof P, Fabritz L, Breithardt G, Haverkamp W. Divergent proarrhythmic potential of macrolide antibiotics despite similar QT prolongation: fast phase 3 repolarization prevents early afterdepolarizations and torsade de pointes. J Pharmacol Exp Ther. 2002 Oct;303(1):218-25. doi: 10.1124/jpet.102.037911.
PubMed 12235254Choi MG, Camilleri M, Burton DD, Zinsmeister AR, Forstrom LA, Nair KS. [13C]octanoic acid breath test for gastric emptying of solids: accuracy, reproducibility, and comparison with scintigraphy. Gastroenterology. 1997 Apr;112(4):1155-62. doi: 10.1016/s0016-5085(97)70126-4.
PubMed 9097998Ziegler D, Schadewaldt P, Pour Mirza A, Piolot R, Schommartz B, Reinhardt M, Vosberg H, Brosicke H, Gries FA. [13C]octanoic acid breath test for non-invasive assessment of gastric emptying in diabetic patients: validation and relationship to gastric symptoms and cardiovascular autonomic function. Diabetologia. 1996 Jul;39(7):823-30. doi: 10.1007/s001250050516.
PubMed 8817107Bromer MQ, Kantor SB, Wagner DA, Knight LC, Maurer AH, Parkman HP. Simultaneous measurement of gastric emptying with a simple muffin meal using [13C]octanoate breath test and scintigraphy in normal subjects and patients with dyspeptic symptoms. Dig Dis Sci. 2002 Jul;47(7):1657-63. doi: 10.1023/a:1015856211261.
PubMed 12141833Ghoos YF, Maes BD, Geypens BJ, Mys G, Hiele MI, Rutgeerts PJ, Vantrappen G. Measurement of gastric emptying rate of solids by means of a carbon-labeled octanoic acid breath test. Gastroenterology. 1993 Jun;104(6):1640-7. doi: 10.1016/0016-5085(93)90640-x.
PubMed 8500721Nyren O, Adami HO, Bates S, Bergstrom R, Gustavsson S, Loof L, Sjoden PO. Self-rating of pain in nonulcer dyspepsia. A methodological study comparing a new fixed-point scale and the visual analogue scale. J Clin Gastroenterol. 1987 Aug;9(4):408-14.
PubMed 3655274Chey WD, Shapiro B, Zawadski A, Goodman K. Gastric emptying characteristics of a novel (13)C-octanoate-labeled muffin meal. J Clin Gastroenterol. 2001 May-Jun;32(5):394-9. doi: 10.1097/00004836-200105000-00007.
PubMed 11319309Lee JS, Camilleri M, Zinsmeister A, et al. Accurate simple measurement of gastric emptying by 13C octanoic acid breath test (OBT) in diabetes. Gastroenterology 1999; 116: G4207.
Ware JE Jr, Snow KK, Kosinski M, Gandek B. SF-36 Health Survey: Manual and Interpretation Guide. Boston, MA: The Health Institute, New England Medical Center, 1993.
Talley NJ, Haque M, Wyeth JW, Stace NH, Tytgat GN, Stanghellini V, Holtmann G, Verlinden M, Jones M. Development of a new dyspepsia impact scale: the Nepean Dyspepsia Index. Aliment Pharmacol Ther. 1999 Feb;13(2):225-35. doi: 10.1046/j.1365-2036.1999.00445.x.
PubMed 10102954
Study at a glance
From the registry record, last updated by the sponsor on 5 Dec 2014. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparison of Two Macrolides, Azithromycin and Erythromycin, for Symptomatic Treatment of Gastroparesis
- ClinicalTrials.gov ID
- NCT01323582
- Acronym / sponsor ID
- AZI / 645-2008
- Conditions
- Gastroparesis
- Keywords
- Gastroparesis, Gastroparesis Treatment, Gastric Emptying, Prokinetic Agents, Macrolides, Erythromycin, Azithromycin, Erythromycin Cardiac Side-effects
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- TerminatedReason stopped: Original investigator left this institution, replacement investigator retired.
- Enrolment
- 26 participants (actual)
- Lead sponsor
- University of FloridaUniversity, hospital or other
- Collaborators
- Metabolic Solutions Inc.
- Study start
- Feb 2009
- Primary completion
- Dec 2012 (actual)
- Study completion
- Dec 2012 (actual)
- First posted
- 25 Mar 2011 (estimated)
- Results
- Posted 5 Dec 2014
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Erythromycin is effectively used in the treatment of Gastroparesis (GP) patients. In susceptible patients however, it has been associated with sudden cardiac death due to prolongation of QT intervals and subsequent cardiac risks through its interaction some other drugs. Azithromycin (AZI) is a macrolide antibiotic but does not have the mentioned druf interactions , has fewer gastrointestinal side effects, and fewer risks of QT prolongation and cardiac arrhythmias. Consequently, AZI avoids drawbacks of dosing with erythromycin and may be preferred as a prokinetic agent in patients on other concomitant medications.
We hope to demonstrate the effectiveness of Azithromycin (AZI) as compared to Erythromycin in the treatment of Gastroparesis (GP), and later, form the framework for larger randomized-controlled parallel studies to investigate use of AZI for treatment of GP.
Our novel hypothesis is to determine whether AZI can be used to treat GP.
Detailed description
Gastroparesis (GP) is a chronic gastrointestinal motility disorder resulting from delayed transit of gastric contents from the stomach into the duodenum in the absence of mechanical outlet obstruction. The symptoms of GP are variable but include early satiety, bloating, nausea, vomiting, and epigastric abdominal pain. Although the true prevalence of the disorder is unknown, symptoms suggestive of GP are present in 7-15% of the population with an estimated one-third of diabetic patients in tertiary care settings having abnormal gastric emptying studies. Yet, despite the significant healthcare and economic costs due to frequent hospitalization in these patients, treatment of GP is difficult due to the lack of available treatment options and the often potential side effects of available prokinetic agents, including cardiac side effects such as QT prolongation, sudden cardiac death, and torsade de pointes.
One such medication used for treatment of GP is erythromycin. Erythromycin has its drawbacks. Several reports of cardiac arrhythmias associated with use of either oral or intravenous (IV) Erythromycin have been reported. This finding sparked our interest in another macrolide, Azithromycin (AZI), which does not have the drug-drug interactions as seen with erythromycin and is not metabolized by the CYP3A inhibitors, therefore having fewer cardiac side effects.
In This study our primary goal is to determine whether AZI can be used to treat GP.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Double blind (participant, investigator)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| erythromycin | Active comparator | Drug: Erythromycin200mg/5ml elixir administered orally three times a day half an hour prior to meals. |
| Azithromycin | Experimental | Drug: AzithromycinThe dose of Azithromycin was determined based on our dose response curve obtained on 10 healthy subjects who were given three different doses of Azithromycin, 50 mg, 100 mg and 133 mg and underwent breath testing to determine the gastric emptying half-time. These doses were determined based on a maximum safe dosage per day of Azithromycin of 400 mg given the medication would then be administered three times daily before meals. The appearance of the medication (azithromycin) and administration period was then identical to that of Erythromycin, i.e. 5ml elixir administered orally three times a day half an hour prior to meals. The total daily dosage of Azithromycin was determined after obtaining the dose- response analysis. |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- presenting to gastroenterology motility specialty clinics at the University of Florida (UF), who meet the clinical and radiologic diagnostic criteria for diagnosis of GP
Key exclusion criteria (17 listed)
- Any history of mechanical obstruction
- Gastrointestinal malignancy
- Current use of prokinetics such as cisapride, pimozide, or anticholinergic medication which cannot be discontinued 72 hrs prior to study
- Abnormal upper endoscopy with finding of erosions or ulcerations
- Helicobacter pylori infection in past 6 months
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| ErythromycinAlso: Erythromycin ethylsuccinate200mg/5ml elixir administered orally three times a day half an hour prior to meals. | Drug | erythromycin |
| AzithromycinThe dose of Azithromycin given was determined based on the following study on 10 healthy subjects. In random order, each of ten healthy subjects underwent OBT studies following administration of AZI, at doses of 50mg, 100mg, and 133mg. The T½ and Tlag was then compared for the three doses by a randomized block analysis using Analysis of Variance followed by Tukey's multiple comparison. Results: The T½ for each of the respective doses of AZI (50mg, 100mg, and 133mg) was 129 ± 27, 128 ± 31, and 128 ± 16 minutes (p = 0.98). This data suggested that AZI at doses of 50mg, 100mg and 133 mg have fairly similar activity in its effects on gastric emptying in healthy subjects. Based on this analysis , we decided to use a dose of 50 mg/5 ml for administered TID prior to meals. | Drug | Azithromycin |
Primary outcome
Time in Minutes for 50% of the Ingested Meal to Empty the Stomach With a Standardized Breath Test: Half the of the Week 11 Value (Period 2) Less Half the of the Week 4 Value (Period 1). This Estimates the Effect Size.
Time frame: Weeks 4 and 11 (end of periods)
Patients will be given a standardized meal enriched with a labeled material and the breath samples are then collected and analyzed. The estimated time to empty 50% (t 1/2) of the accumulated contents is recorded. Because the difference is RX-B -RX A in one group and RX A -RX B in the other, the difference between these two estimates twice the effect size. Hence the Half is applied, as is standard in the two sample method for crossover studies.
Gastroparesis Cardinal Symptom Index (GCSI) Score
Time frame: Weeks 4 and 11 (end of periods)
This is a Validated instrument for measuring symptom severity in patients with gastroparesis. This scoring is based on a Likert Scale from (0-5) with zero being no symptoms and five being very severe symptoms on 9 subscales, making the overall score range from 0-45. The higher the score, the more severe patient's symptoms. Reference for GCSI: Revicki DA, REntz AM, Dubois D, et al. Development and validation of a patient-assessed gastroparesis symptoms severity measure: the Gastroparesis Cardinal Symptom Index. Ailment Pharm Ther 2003; 18: 141:50. Because the difference is RX-B -RX A in one group and RX A -RX B in the other, the difference between these two estimates twice the effect size. Hence the Half is applied, as is standard in the two sample method for crossover studies.
6 secondary outcomes
NDI Score
Time frame: Weeks 4 and 11 (end of periods)
TLAG (Time From Ingestion of Meal to Start of Gastric Emptying)
Time frame: Weeks 4 and 11 (end of periods)
Change in Time to 50% Gastric Emptying: Post Test Less Baseline Pooled Over Orderings
Time frame: Baseline and end of treatment period
Change in Time to 50% Emptying: Post Test Less Baseline Pooled Over Orderings
Time frame: at baseline before initiation of the treatment and after completion of each treatment period.
Gastroparesis Cardinal Symptom Index (GCSI) Score Change From Baseline to Post Treatment
Time frame: Baseline and end of treatment period
Does GCSI Score Improve (Lower) on Treatment, Pooling the AZ Patients Over Their Treatment Periods? Endpoint is Difference in Post-test Less Baseline
Time frame: Baseline and end of treatment period
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 5 Dec 2014.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
- Background: PubMed 15356306Ray WA, Murray KT, Meredith S, Narasimhulu SS, Hall K, Stein CM. Oral erythromycin and the risk of sudden death from cardiac causes. N Engl J Med. 2004 Sep 9;351(11):1089-96. doi: 10.1056/NEJMoa040582.
- Background: PubMed 10759254Frank L, Kleinman L, Ganoczy D, McQuaid K, Sloan S, Eggleston A, Tougas G, Farup C. Upper gastrointestinal symptoms in North America: prevalence and relationship to healthcare utilization and quality of life. Dig Dis Sci. 2000 Apr;45(4):809-18. doi: 10.1023/a:1005468332122.
- Background: PubMed 16322108Talley NJ, Locke GR 3rd, Lahr BD, Zinsmeister AR, Tougas G, Ligozio G, Rojavin MA, Tack J. Functional dyspepsia, delayed gastric emptying, and impaired quality of life. Gut. 2006 Jul;55(7):933-9. doi: 10.1136/gut.2005.078634. Epub 2005 Dec 1.
- Background: PubMed 9824125Soykan I, Sivri B, Sarosiek I, Kiernan B, McCallum RW. Demography, clinical characteristics, psychological and abuse profiles, treatment, and long-term follow-up of patients with gastroparesis. Dig Dis Sci. 1998 Nov;43(11):2398-404. doi: 10.1023/a:1026665728213.
- Background: PubMed 16614168Wisialowski T, Crimin K, Engtrakul J, O'Donnell J, Fermini B, Fossa AA. Differentiation of arrhythmia risk of the antibacterials moxifloxacin, erythromycin, and telithromycin based on analysis of monophasic action potential duration alternans and cardiac instability. J Pharmacol Exp Ther. 2006 Jul;318(1):352-9. doi: 10.1124/jpet.106.101881. Epub 2006 Apr 13.
- Background: PubMed 12235254Milberg P, Eckardt L, Bruns HJ, Biertz J, Ramtin S, Reinsch N, Fleischer D, Kirchhof P, Fabritz L, Breithardt G, Haverkamp W. Divergent proarrhythmic potential of macrolide antibiotics despite similar QT prolongation: fast phase 3 repolarization prevents early afterdepolarizations and torsade de pointes. J Pharmacol Exp Ther. 2002 Oct;303(1):218-25. doi: 10.1124/jpet.102.037911.
- Background: PubMed 9097998Choi MG, Camilleri M, Burton DD, Zinsmeister AR, Forstrom LA, Nair KS. [13C]octanoic acid breath test for gastric emptying of solids: accuracy, reproducibility, and comparison with scintigraphy. Gastroenterology. 1997 Apr;112(4):1155-62. doi: 10.1016/s0016-5085(97)70126-4.
- Background: PubMed 8817107Ziegler D, Schadewaldt P, Pour Mirza A, Piolot R, Schommartz B, Reinhardt M, Vosberg H, Brosicke H, Gries FA. [13C]octanoic acid breath test for non-invasive assessment of gastric emptying in diabetic patients: validation and relationship to gastric symptoms and cardiovascular autonomic function. Diabetologia. 1996 Jul;39(7):823-30. doi: 10.1007/s001250050516.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Baharak Moshiree, MD principal investigator
University of Florida
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Erythromycin and Azithromycin in people with Gastroparesis, run by University of Florida at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 17 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: stopped early, as of the sponsor's last update on 5 Dec 2014. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 5 Dec 2014). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Time in Minutes for 50% of the Ingested Meal to Empty the Stomach With a Standardized Breath Test: Half the of the Week 11 Value (Period 2) Less Half the of the Week 4 Value (Period 1). This Estimates the Effect Size. (time frame: Weeks 4 and 11 (end of periods)). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT01323582, which also lists 15 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 5 Dec 2014.