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Infections, BacterialPhase 1NCT01431989

Amoxicillin Bioequivalence Study Brazil - Fast

A Phase 1 study testing Amoxicillin powder for oral suspension (Clamoxyl®) 500mg/5mL and Amoxil® 500mg/5mL powder for oral suspension in people with Infections, Bacterial, run by GlaxoSmithKline at 1 site in Brazil.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This study is prospective, open-label, randomized, crossover, single dose, with 02 treatments, 02 sequences and 02 periods. The volunteers received, in each period, the reference or the test formulation, according to the randomization list, under fasting conditions, in order to evaluate if the reference and test… Read more about this study

Who is it for?
Ages 18 to 50 yearsHealthy volunteers can take part
Conditions the study is for
Infections, Bacterial
What is being tested?
Amoxicillin powder for oral suspension (Clamoxyl®) 500mg/5mL and Amoxil® 500mg/5mL powder for oral suspension
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
28 participants
Where
1 siteBrazil
Study dates
27 May 2011to 11 Jun 2011
Phase
Phase 1
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 50 years
  • All sexes
  • Healthy volunteers accepted
  • Adult

Who may be able to join

  • Age between 18 and 50 years
  • Body mass index between 18,5 and 25,0, can vary up to 15% for the upper limit (18,5 and 28,75)
  • Good health conditions
  • Obtain signed informed consent

Who cannot join

  • Results of laboratory tests outside the normal limits, unless they are considered clinically irrelevant
  • The volunteers who underwent surgery or who were hospitalized for any reason before the start of the study will be reviewed by the physician on admission in the study, observing a period of exclusion of 4 to 8 weeks
  • Positive test for hepatitis B, hepatitis C or HIV in pre study evaluation
  • Known hypersensitivity to the study drug or to compounds chemically related
  • Use of experimental drug or participation in any clinical study within 6 months prior to study initiation
  • Use of regular medication within 2 weeks prior to study initiation
Show all 20Show fewer
  • History of alcohol or drugs abuse or intake of alcohol within 24 hours prior to the period of confinement
  • Consume of inductive drugs and/or enzymatic inhibitors (CYP450 - hepatic), that are toxic for the organism or presenting long half-life's elimination within 30 days prior to study initiation
  • Use of MAO and serotonin reuptake inhibitors within 2 weeks prior to study initiation
  • Volunteers with psychiatric or psychological illness unless they are considered clinically irrelevant by the investigator
  • History or presence of hepatic, renal or gastrointestinal illness or other condition that interferes on drug's absorption, distribution, excretion or metabolism
  • History of neurological, endocrine, pulmonary, hematologic, immune, brain, metabolic or cardiovascular illness
  • Hypo or hypertension of any etiologic that needs pharmacologic treatment
  • History or clinical case of myocardial infarction, angina and/or heart failure
  • The volunteer donated or lost 450 mL or more of blood within the 3 months prior to the study initiation
  • The volunteer has any condition that obstructs his/her participation in the study according the investigator's judgement
  • Smoking
  • Positive beta HCG exam for women
  • Breastfeeding women
  • Women making use of contraceptive medication

Trial locations and contacts

1 site in 1 country.

Brazil1 site
  • GSK Investigational Site

    Goiânia, Goiás

Other trials in Brazil

About this study

Official title: Evaluation of Pharmaceutical Bioequivalence of Amoxicillin Trihydrate - Clamoxyl 500mg/5mL (Glaxo Wellcome Production.) in the Form Powder for Oral Suspension Versus Amoxil ® 500mg/5mL (GlaxoSmithKline Mexico SA) in the Form of Powder for Oral Suspension in Healthy Volunteers and Fasting, Using Techniques of Liquid Chromatography

This study is prospective, open-label, randomized, crossover, single dose, with 02 treatments, 02 sequences and 02 periods. The volunteers received, in each period, the reference or the test formulation, according to the randomization list, under fasting conditions, in order to evaluate if the reference and test formulations are bioequivalent.

Read the detailed description

This study is prospective, open-label, randomized, crossover, single dose, with 02 treatments, 02 sequences and 02 periods. The objective is to confirm if two formulations of Amoxicillin trihydrate, in the form powder for oral suspension, are bioequivalent. The test product is Amoxicillin trihydrate - Clamoxyl 500mg/5mL (Glaxo Wellcome Production.) in the form powder for oral suspension and reference product is Amoxil ® 500mg/5mL (GlaxoSmithKline Mexico SA) in the form of powder for oral suspension. Twenty eight healthy volunteers, of both genders, were evaluated. The volunteers received, in each period, the reference or the test formulation, according to the randomization list, under fasting conditions. In each period blood samples are collected in the following times: 0.00 (prior to administration of medication); 0.25; 0.50; 0.75; 1.00; 1.25; 1.50; 1.75; 2.00; 2.50; 3.00; 4.00; 5.00; 6.00; 8.00 (after administration of medication). The comparative bioavailability of the two formulations was evaluated based in statistical comparisons of relevant pharmacokinetic parameters, obtained from data of drug concentrations in blood.

Being tested
Amoxicillin powder for oral suspension (Clamoxyl®) 500mg/5mL, Amoxil® 500mg/5mL powder for oral suspension
Medical subject headings
Bacterial Infections

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Amoxicillin powder for oral suspension (Clamoxyl®) 500mg/5mLDrug

    Test formulation

  • Amoxil® 500mg/5mL powder for oral suspensionDrug

    Reference formulation

Study groups in NCT01431989
Study groupRoleWhat they receive
Test formulationActive comparatorTest product: Amoxicillin powder for oral suspension (Clamoxyl®) 500mg/5mL in Period 1; followed by 14-days washout period during which no medication was administered; followed by reference product: Amoxil® 500mg/5mL in Period 2.
Receives: Drug: Amoxicillin powder for oral suspension (Clamoxyl®) 500mg/5mL
Reference formulationActive comparatorReference product: Amoxil® 500mg/5mL powder for oral suspension in Period 1; followed by 14-days washout period during which no medication was administered; followed by test product: Amoxicillin powder for oral suspension (Clamoxyl®) 500mg/5mL in Period 2
Receives: Drug: Amoxil® 500mg/5mL powder for oral suspension

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Area Under the Curve of Plasma Concentration of Drug From Time 0 (Zero) to t (Last Measurable Concentration) (AUC0-t)

    The area under the plot of plasma concentration of drug against time (non-compartmental method), after drug administration, is defined as the area under the curve (AUC). AUC0-t is calculated from time 0 (prior to administration of medication) to time t (the time of the last quantifiable concentration). AUC is of particular use in estimating the bioavailability of drugs, by measuring the extent of absorption. ng, nanograms; mL, milliliter.

    Measured: Collection points (hours [hrs]): 0.00; 0.25; 0.50; 0.75; 1.00; 1.25; 1.50; 1.75; 2.00; 2.50; 3.00; 4.00; 5.00; 6.00; 8.00 evaluated in both periods (Day 1 of Period 1 [Day 1 of study]; Day 1 of Period 2 [Day 15 of study])

  2. Maximum Observed Concentration of Drug Through Time (Cmax)

    Cmax is defined as the maximum or "peak" concentration of a drug observed after its administration. Cmax is one of the parameters of particular use in estimating the bioavailability of drugs, by measuring the total amount of drug absorbed. Measurement is obtained directly from the plasma concentration curve of the drug (non-compartmental method).

    Measured: Collection points (hrs): 0.00; 0.25; 0.50; 0.75; 1.00; 1.25; 1.50; 1.75; 2.00; 2.50; 3.00; 4.00; 5.00; 6.00; 8.00 evaluated in both periods (Day 1 of Period 1 [Day 1 of study]; Day 1 of Period 2 [Day 15 of study])

  3. Area Under the Curve of Plasma Concentration of Drug From Time 0 (Zero) Extrapolated to Infinity (AUC0-inf)

    Measurement of AUC0-inf is obtained directly from the plasma concentration curve of drug against time (non-compartmental method). AUC0-inf is calculated from time 0 (prior to administration of medication) extrapolated to infinity, by using the formula AUC0-inf = AUC0-t + Clast/Kel, where Clast is the last measurable concentration, and Kel is the first-order rate constant associated with the terminal portion of the curve. AUC is of particular use in estimating the bioavailability of drugs, by measuring the extent of absorption.

    Measured: Collection points (hrs):0.00; 0.25; 0.50; 0.75; 1.00; 1.25; 1.50; 1.75; 2.00; 2.50; 3.00; 4.00; 5.00; 6.00; 8.00 evaluated in both periods (Day 1 of Period 1[Day 1 of study]; Day 1 of Period 2 [Day 15 of study])

  4. Time of Maximum Observed Concentration (Tmax)

    The time of maximum observed concentration (Tmax) is obtained directly from the plasma concentration curve of the drug by non-compartimental method. Tmax is of particular use in measuring bioavailability, by measuring the time at which the maximum concentration is achieved.

    Measured: Collection points (hrs):0.00; 0.25; 0.50; 0.75; 1.00; 1.25; 1.50; 1.75; 2.00; 2.50; 3.00; 4.00; 5.00; 6.00; 8.00 evaluated in both periods: (Day 1 of Period 1 [Day 1 of study]; Day 1 of Period 2 [Day 15 of study])

  5. Percentage of AUC0-inf That is Due to Extrapolation From the Time of the Last Measurable Concentration to Infinity (AUC%Extrapolation)

    The percentage of AUC0-inf that is due to extrapolation from Tlast to infinity (AUC%Extrapolation) is calculated by using the formula AUC_%extrapolation = 100*(AUC0-inf minus AUC0-t)/AUC0-inf. The function of this parameter is to provide information about what percentage of the theoretical curve (AUC0-inf) was possible to determine experimentally (AUC0-t) Therefore, on average, it is expected that the residual area (AUCextrapolation) is not greater than 20%.

    Measured: Collection points (hrs):0.00; 0.25; 0.50; 0.75; 1.00; 1.25; 1.50; 1.75; 2.00; 2.50; 3.00; 4.00; 5.00; 6.00; 8.00 evaluated in both periods: (Day 1 of Period 1 [Day 1 of study]; Day 1 of Period 2 [Day 15 of study])

  6. Terminal Half-life (T1/2_Kel)

    T1/2_Kel is calculated by using the formula T1/2_Kel = Ln(2)/Kel.T1/2 is of particular use in measuring bioavailability, by measuring the elimination of the product.

    Measured: Collection points (hrs):0.00; 0.25; 0.50; 0.75; 1.00; 1.25; 1.50; 1.75; 2.00; 2.50; 3.00; 4.00; 5.00; 6.00; 8.00 evaluated in both periods: (Day 1 of Period 1 [Day 1 of study]; Day 1 of Period 2 [Day 15 of study])

  7. First-order Rate Constant Associated With the Terminal Portion of the Curve (Kel)

    This parameter is estimated via linear regression of time versus log concentration. It allows for the obtainment of estimates of T1/2 (T1/2=ln(2)/Kel) considering the schedule and the detection limits defined.

    Measured: Collection points (hrs):0.00; 0.25; 0.50; 0.75; 1.00; 1.25; 1.50; 1.75; 2.00; 2.50; 3.00; 4.00; 5.00; 6.00; 8.00 evaluated in both periods: (Day 1 of Period 1 [Day 1 of study]; Day 1 of Period 2 [Day 15 of study])

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted12 Sep 2011 (estimated)
  2. Study start27 May 2011
  3. Primary completion11 Jun 2011
  4. Study completion11 Jun 2011

Resources

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 1
Primary purpose
Other
Allocation
Randomised
Intervention model
Crossover
Masking
None (open label)
Enrolment
28 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT01431989
Sponsor's protocol ID
115954
Status last verified
Jun 2018
First submitted
8 Sep 2011
Last updated
20 Jun 2018
Data monitoring committee
No

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing Amoxicillin powder for oral suspension (Clamoxyl®) 500mg/5mL and Amoxil® 500mg/5mL powder for oral suspension in people with Infections, Bacterial, run by GlaxoSmithKline at 1 site in Brazil.

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 4 inclusion and 20 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: finished, as of the sponsor's last update on 20 Jun 2018. 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 Brazil. 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 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

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 7 Feb 2012). 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?

Area Under the Curve of Plasma Concentration of Drug From Time 0 (Zero) to t (Last Measurable Concentration) (AUC0-t) (time frame: Collection points (hours [hrs]): 0.00; 0.25; 0.50; 0.75; 1.00; 1.25; 1.50; 1.75; 2.00; 2.50; 3.00; 4.00; 5.00; 6.00; 8.00 evaluated in both periods (Day 1 of Period 1 [Day 1 of study]; Day 1 of Period 2 [Day 15 of study])). The study lists 7 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
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 20 Jun 2018.

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