Conditions: Female Sexual Dysfunction
Keywords: testosterone pharmacokinetics
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 24
Healthy volunteers: yes

Brief summary:
The purpose of this study was to assess the bioavailability of total testosterone through pharmacokinetic profiles obtained following (a) single administration of three doses of TBS-2 b) multiple administration TBS-2.

In addition, assessing the bioavailability of free testosterone, dihydrotestosterone, SHBG and estradiol through pharmacokinetic profiles was also conducted.

Detailed description:
This is a 2 Period study that requires overnight stays in clinic. Blood samples are required at all visits including sampling at predefined time periods during the overnight stays.

Period I

Subjects were checked-in on Day 1 Period I to start their baseline testosterone measurement (dependant on menstrual cycle, preferably within 48hr of start of the menstrual cycle). They remained institutionalized until Day 4 morning, and were checked out after the 48 hour blood draw and study close-out for those that did not continue with Period II.

Period II (Multi-Dose)

At the end of Period 1, a total of 8 subjects sampled from these 3 cohorts, who were willing and able to continue with the multiple-dose portion of the study were selected to participate in Period 2. Subjects were institutionalized starting on Day 1 of Visit 3 until Day 5 morning of Visit 3, and were checked out after the 48 hour blood draw and study close-out.

Arms:
arm 1: TBS-2 dispensers prefilled with 0.24% testosterone gel to deliver a single dose of 300 μg of testosterone per nostril, for a total dose of 600 μg given at 0800 hours (±30 minutes) on Day 2 of Period 1 for Cohort 1 (Low dose testosterone nasal gel, single dose) arm 2: TBS-2 dispensers prefilled with 0.48% testosterone gel to deliver a single dose of 600 μg of testosterone per nostril, for a total dose of 1200 μg given at 0800 hours (±30 minutes) on Day 2 of Period 1 for Cohort 2 (Medium dose testosterone nasal gel, single dose) arm 3: TBS-2 dispensers prefilled with 0.72% testosterone gel to deliver a single dose of 900 μg of testosterone per nostril, for a total dose of 1800 μg given at 0800 hours (±30 minutes) on Day 2 of Period 1 for Cohort 3 (High dose testosterone nasal gel, single dose) arm 4: TBS-2 dispensers prefilled with 0.48% testosterone gel to deliver a single dose of 600 μg of testosterone per nostril, for a total dose of 1200 μg given t.i.d. daily at 0800 hours (± 30 minutes), 1600 hours (± 30 minutes), and 2400 hours (± 30 minutes) on Days 1 and 2 of Period 2, and once in the morning at 0800 hours (± 30 minutes) on Day 3 of Period 2 (Multi-dose group) (Medium dose testosterone nasal gel, multiple dose)

Interventions: intervention 1: Low dose testosterone nasal gel, single dose intervention 2: Medium dose testosterone nasal gel, single dose intervention 3: High dose testosterone nasal gel, single dose intervention 4: Medium dose testosterone nasal gel, multiple dose
Intervention descriptions: intervention 1: Low dose testosterone nasal gel, single dose intervention 2: Medium dose testosterone nasal gel, single dose intervention 3: High dose testosterone nasal gel, single dose intervention 4: Medium dose testosterone nasal gel, multiple dose

Protocol document: