title: Bioequivalence of liquid and freeze-dried recombinant human follicle-stimulating hormone.
abstract: OBJECTIVE
  The bioequivalence and tolerability of freeze-dried and liquid formulations of recombinant human follicle-stimulating hormone (r-hFSH) filled-by-mass were assessed in a crossover, open-label, randomised, single-centre, phase I bioequivalence study.
  
  
  METHODS
  Following pituitary down-regulation with the gonadotrophin-releasing hormone agonist goserelin, healthy adult volunteers (18years-45years of age) received single subcutaneous injections of r-hFSH , 300 IU, from freeze-dried and liquid formulations in random order, separated by a 7-day washout period. Blood was obtained over 144 h for pharmacokinetic analysis.
  
  
  METHODS
  These were peak serum FSH concentrations (Cmax,), time to peak concentration (Tmax) and area under the concentration-time curve from zero to the last measurable concentration (AUCJ), local and systemic tolerability.
  
  
  RESULTS
  Of 44 volunteers who underwent down-regulation, 39 (18 men, 21 women) completed the study. Cmax and AUClast were similar with the freeze-dried (mean 9.51 IU/L and 844 IU.h/L, respectively) and liquid (mean 8.99 IU/L and 841 IUh/L, respectively) formulations, whereas T was significantly higher with the liquid formulation (median 12h vs 15h, p = 0.0183). The 90% confidence intervals for the ratio of the treatment means for Cnw and AUC,=, were within the pre-defined bioequivalence range of 0.8-1.25.
  
  
  CONCLUSIONS
  Both formulations were well tolerated with regard to both systemic and local adverse events. The freeze-dried and liquid formulations of r-hFSH are bioequivalent and show no significant differences in tolerability. Thus, the liquid formulation is expected to provide comparable efficacy and tolerability to the freeze-dried formulation in clinical use.
authors.affiliation: International SA, R&Ph Development HPG, Geneva, Switzerland. isabelle.lugan@serono.com
authors.forename: I
authors.initials: I
authors.lastname: Lugan
authors.forename: S
authors.initials: S
authors.lastname: Febbraro
authors.forename: H
authors.initials: H
authors.lastname: Lecuelle
authors.forename: O
authors.initials: O
authors.lastname: Papasouliotis
authors.forename: Q
authors.initials: Q
authors.lastname: Ho-Nguyena
authors.forename: M
authors.initials: M
authors.lastname: Buraglio
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D019540:Area Under Curve; D018592:Cross-Over Studies; D005260:Female; D005640:Follicle Stimulating Hormone / Q000493:pharmacokinetics*; D005612:Freeze Drying; D006801:Humans; D008297:Male; D008875:Middle Aged; D018709:Statistics, Nonparametric; D013810:Therapeutic Equivalency
chemical_list: D005640:Follicle Stimulating Hormone