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Menopause. 2015 Jan;22(1):44-9. doi: 10.1097/GME.0000000000000259.

Pharmacokinetics of a transdermal testosterone cream in healthy postmenopausal women.

Author information

  • 1From the 1Women's Health Research Program, School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC, Australia; and 2School of Pharmacy and Medical Sciences and 3Sansom Institute for Health Research, University of South Australia, Adelaide, SA, Australia.

Abstract

OBJECTIVE:

The steady-state pharmacokinetics of two doses of a transdermal testosterone cream (TTC) was investigated after daily application for 21 days.

METHODS:

This was a two-way cross-over study conducted for 6 weeks. Seven healthy postmenopausal women (mean age, 59.3 y) were randomly allocated to 5 or 10 mg of TTC applied daily to the upper arm. Serum total testosterone (TT), free testosterone (fT), sex hormone-binding globulin, and metabolite concentrations were measured. Baseline-corrected and uncorrected serum TT and fT pharmacokinetic parameters (AUC0-24, C avg, Cmax, and Tmax) were calculated using a standard model-independent approach.

RESULTS:

After the single-dose application of 5 mg of TTC on day 22, the median uncorrected TT C avg was found to be 0.54 ng/mL (range, 0.43-1.31), and the median uncorrected fT C avg was found to be 4.14 pg/mL (range, 2.41-9.72). Doubling of the dose only resulted in a 30% increase in baseline-corrected TT C avg (0.52 vs 0.69 ng/mL for 5 and 10 mg, respectively) and a 31% increase in baseline-corrected fT C avg (4.75 vs 6.24 pg/mL for 5 and 10 mg, respectively). Neither dose resulted in any meaningful variation in dihydrotestosterone, estrone, estradiol, or sex hormone-binding globulin across the postdose sampling period.

CONCLUSIONS:

The 5-mg TTC dose restores TT and fT levels to levels above and within the reference range, respectively, for premenopausal women.

PMID:
24845394
[PubMed - indexed for MEDLINE]
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