Details

Autor(en) / Beteiligte

• Levy, T.
• Gurevitch, S.
• Bar-Hava, I.
• Ashkenazi, J.
• Magazanik, A.
• Homburg, R.
• Orvieto, R.
• Ben-Rafael, Z.

Titel

Pharmacokinetics of natural progesterone administered in the form of a vaginal tablet

Ist Teil von

• Human reproduction (Oxford), 1999-03, Vol.14 (3), p.606-610

Ort / Verlag

Oxford: Oxford University Press

Erscheinungsjahr

1999

Quelle

Oxford Journals 2020 Medicine

Beschreibungen/Notizen

• Our study was conducted to assess the pharmacokinetics of natural progesterone administered in the novel formula of an effervescent vaginal tablet. Fifty post-menopausal women, with a median age of 43.5 years (range 28–55), volunteered to participate in the research. All women discontinued their hormonal replacement therapy 1 month prior to the study. The pharmacokinetics of 50 and 100 mg of progesterone administered as a vaginal tablet were evaluated. After the initial administration of 50 mg or 100 mg, a mean serum Cmax of 20.43 ± 8.01 nmol/l and 31.61 ± 12.62 nmol/l (P < 0.0004) was reached at a Tmax of 6.1 ± 2.63 and 6.4 ± 3.35 h respectively. The terminal half-life was 13.18 ± 1.3 and 13.7 ± 1.05 h respectively. Continuous use of the 100-mg tablet resulted in a mean serum progesterone concentration of 26.08 ± 13.96 nmol/l and 21.42 ± 16.32 nmol/l after 14 and 30 days respectively. Women >40 years were found to have a significantly lower Tmax compared to younger women (P = 0.02). The continuous use of vaginal progesterone did not influence the hormonal, liver or lipid profiles evaluated. Only three (6%) women suffered from mild vaginal irritation. Natural progesterone given as a vaginal tablet is well tolerated, safe and an easily administered treatment. Even in a non-oestrogenized vagina the absorption was efficient and the 100 mg dosage resulted in adequate serum progesterone concentrations.