A Healthy Volunteer Study to Investigate the Relative Bioavailability of Two Forms of GSK598809 Capsules.

An Open Label, Randomised, Single Dose, Three-way Crossover Study to Investigate the Relative Bioavailability of a 100mg Capsule Compared to Four 25mg GSK598809 Capsules and the Effect of Food on the Pharmacokinetics of the 100mg Capsule in Healthy Male and Female Volunteers.

Status

Completed

Phases

Phase 1

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT00728897

Enrollment

Registered

2008-08-06

Start date

2008-07-02

Completion date

2008-07-29

Last updated

2017-08-04

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Substance Dependence

Keywords

Healthy volunteer, relative bioavailability.

Brief summary

Study to compare PK of a new 100mg capsule with four 25mg capsules. This is required because we plan to have only single capsules administered in the later phase clinical trials but we have not had a 100mg strength before. As this is a new previously untested strength we need to ensure that the PK is similar to that achieved using 4 x 25mg. The study will also assess the effect of high fat food on the PK of the 100mg capsule. The study is planned to consist of a single part , with three dosing periods, periods 1-3 consisting of 16 subjects. There will be a week wash out between each dose. In the three dosing periods subjects will either received 4x25 mg GSK598809 capsule in a fasted state, 100mg capsule in a fasted state or 100mg GSK598809 capsule in a fed state. Subjects will return to the centre for follow-up 7-14 days after the final dose. It is expected that the total duration of the study should be approximately eight weeks.

Interventions

DRUGGSK598809 new formulation

GSK598809 new formulation will be available as an immediate release capsule with a single dose of 100 milligrams, administered orally with 240 milliliters of water.

DRUGGSK598809 old formulation

GSK598809 old formulation will be available as an immediate release capsule with a single dose of 25 milligrams, administered orally with 240 milliliters of water.

Study design

Allocation

RANDOMIZED

Intervention model

CROSSOVER

Primary purpose

TREATMENT

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

18 Years to 65 Years

Healthy volunteers

Yes

Inclusion criteria

Inclusion: * Healthy as determined by responsible physician. * Male or female between 18 to 65 years old. * Females of non-child bearing potential and females of child-bearing potential that agree to use appropriate method of contraception for appropriate amount of time. * Males that agree to use appropriate method of contraception for appropriate amount of time. * Neither too fat nor too thin. * Capable of giving written informed consent and being compliant with requirements within the informed consent. Exclusion: * Any current medical or psychiatric illness. * Any history of chronic medical or psychiatric illnesses. * Previous or current alcohol or drug abuse/dependence including nicotine. * Female subjects must not be breastfeeding or been breastfeeding for a month. * Serum prolactin exceeding normal range. * Personal or family history of prolonged QTc syndrome.

Design outcomes

Primary

Measure	Time frame
Blood sampling over a period of 96hrs post GSK598809 dosing in the three dosing periods.	Pre-dose, 0, 0.25, 0.5, 1, 1.5, 2, 4, 6, 8. 10, 12, 16, 24, 48. 72 and 96 hours

Secondary

Measure	Time frame
Safety and Tolerability: cardiovascular variables, vital signs, clinical labs, movement scales, prolactin, GH and TSH levels over 96 hours post dosing. Continuous adverse event monitoring from dosing until study conclusions.	Up to 96 hours

Countries

United Kingdom

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026