Pharmacodynamics and pharmacokinetics after repeated subcutaneous administration of three gonadotrophin preparations

Human Reproduction
I J DuijkersH M Vemer

Abstract

Recently, several new urinary gonadotrophin preparations have been developed, containing less luteinizing hormone (LH) activity than human menopausal gonadotrophin. Normegon is a gonadotrophin preparation with a follicle stimulating hormone (FSH)/LH ratio of 3:1; Follegon and Metrodin-HP are purified FSH preparations. The aim of the present randomized study was to compare pharmaco-dynamics, -kinetics and local tolerance of these preparations after repeated s.c. administration. Thirty-six healthy female subjects were treated with Lyndiol contraceptive pills for 5 weeks to suppress endogenous gonadotrophin concentrations. After 3 weeks of Lyndiol treatment, 150 IU of Normegon, Follegon or Metrodin HP were administered once daily, s.c. for 7 days. Blood samples were collected once daily during the fourth and fifth weeks of the study and assayed for FSH and oestradiol. After the last gonadotrophin injection, blood samples were collected more frequently to determine pharmacokinetic parameters of FSH. During the fourth and fifth study weeks, daily ultrasound measurements of follicular growth were performed. Endogenous FSH and LH values were extremely suppressed during Lyndiol treatment. Serum FSH values showed similar patterns in the...Continue Reading

Citations

Aug 16, 2005·Bioorganic & Medicinal Chemistry·Jeffrey C PelletierEmily S Shen

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