Impact of Formulation on Ciprofloxacin Oral Absorption

November 5, 2020 updated by: James E Polli, University of Maryland, Baltimore

The purpose of this research is to see if certain tablet formulation factors affect oral drug absorption. Medications taken by mouth, such as tablets, need to be absorbed into the body in order to do any good. Tablets contain a drug, but also contain non-drug ingredients that are called excipients or fillers. Excipients in the tablet, and the way in which the tablet is manufactured, both can impact how much drug is absorbed into the body. That is, tablet formulation factors can cause a tablet to be effective or not effective.

Tablets in this research contain the drug ciprofloxacin hydrochloride. Ciprofloxacin is an antibiotic to treat infections, such as lung infections. This drug is being used since it has low water solubility and is probably sensitive to tablet formulation factors.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Dogs and humans exhibit differences in gastrointestinal physiology. The development of pharmaceuticals for both humans and dogs typically depends upon pharmacokinetic studies in the other species. Product design and quality attributes for dogs (and for humans)generally conduct such extrapolations in a simplistic fashion, without a systematic account of the differential intestinal physiology between dog and human. This project aims to elucidate product quality differences between human and dog oral solid dosage forms as a result of the differential physiology between the two specifies. This insight will facilitate the regulation of canine medicines by highlighting how product standards for human medicines are either too liberal or too restrictive for canine medicines.

Ciprofloxacin hydrochloride will be used as a model poorly soluble drug. A range of immediate-release (IR) tablets will be formulated to map the design space. Formulations will be fast, medium, and slow, with respect to dissolution rate of drug. Ciprofloxacin is expected to exhibit formulation-dependent pharmacokinetics, which is additionally impacted by the differential physiology between dog and humans. In particular, the investigators anticipate a greater sensitivity to formulation for dogs than for humans. Consequently, the investigators anticipate dogs to be more sensitive to formulations, where such critical formulation factors must be considered in canine product design and regulation.

Objectives: 1) The primary objective of this human study is to assess whether specific formulation factors impact the rate and extent of ciprofloxacin oral absorption, as well as the absolute absorption profile of ciprofloxacin. 2) The secondary objective is to assess if dogs exhibit a greater sensitivity to formulation than do humans.

Hypotheses: The investigators anticipate that humans exhibit a modest sensitivity to specific tablet formulation factors. 1) Hence, the hypothesis of this human study is that humans do not exhibit a sensitivity to specific formulation factors and show no in vitro - in vivo correlation to dissolution rate. 2) Alternative hypothesis is that humans do exhibit a sensitivity to specific formulation factors and show an in vitro - in vivo correlation to dissolution rate.

Study Type

Interventional

Enrollment (Actual)

16

Phase

  • Phase 1

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

    • Maryland
      • Baltimore, Maryland, United States, 21201
        • University of Maryland

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 55 years (Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Male or female
  • Age 18-55
  • Healthy volunteers: Subjects in good health, as determined by screening evaluation that is not greater than 30 days before the first drug study visit
  • Willing to avoid caffeine containing products 24 hours prior to and day of study visits
  • Willing to stop all OTC medications for 24 hours prior to and during study visits
  • Able to provide informed consent

Exclusion Criteria:

  • Presence of significant medical disease (including cardiovascular, pulmonary, hematologic, endocrine, immunologic, neurologic, gastrointestinal or psychiatric)
  • Presence of hepatic, renal disease
  • Pregnant women, breast feeding or trying to become pregnant
  • Excessive alcohol use (i.e. current physical, behavioral, or personal manifestations related to the abuse or dependency on alcohol)
  • Routine use (i.e. daily or weekly) prescription medication except birth control pills
  • Routine use (i.e. daily or weekly) use of acid blockers, antacids, anti-diarrhea, stimulants, appetite suppressants, or anti nausea medication or other drugs that modulate GI function
  • Currently taking ciprofloxacin or tizanidine
  • Allergic to ciprofloxacin or any quinolone-type antibiotic (e.g. levofloxacin)
  • Currently taking a corticosteroid drug (e.g. prednisone)
  • Had a kidney, heart, or lung transplant
  • Any condition in which in the opinion of the PI or medical physician would increase risk to the subject or interfere with the integrity of the study

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: ciprofloxacin tab1
formulation 1
ciprofloxacin 200mg tablet (single dose)
Experimental: ciprofloxacin tab2
formulation 2
ciprofloxacin 200mg tablet (single dose)
Experimental: ciprofloxacin tab 3
formulation 3
ciprofloxacin 200mg tablet (single dose)
Active Comparator: ciprofloxacin reference
reference product
ciprofloxacin 200mg tablet (single dose)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Amount of ciprofloxacin absorbed
Time Frame: 10 hours
Blood samples will be collected to measure level of ciprofloxacin.
10 hours

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Difference between humans and dogs in the amount of cipro absorbed.
Time Frame: 10 hours
Blood samples will be collected to measure level of ciprofloxacin.
10 hours

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Principal Investigator: James Polli, University of Maryland, College Park

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

January 1, 2013

Primary Completion (Actual)

November 1, 2013

Study Completion (Actual)

November 1, 2013

Study Registration Dates

First Submitted

October 2, 2009

First Submitted That Met QC Criteria

October 8, 2009

First Posted (Estimate)

October 9, 2009

Study Record Updates

Last Update Posted (Actual)

November 6, 2020

Last Update Submitted That Met QC Criteria

November 5, 2020

Last Verified

November 1, 2020

More Information

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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