Pharmacokinetic studies in women of 2 novel oral formulations of tranexamic acid therapy for heavy menstrual bleeding.
Two randomized, open-label clinical studies involving healthy female volunteers aged 18-45 years (study 1, N = 32; study 2, N = 40) are described, which characterize the pharmacokinetics and steady-state dosage regimen performance of 2 novel, modified-release tranexamic acid tablet formulations. The objective of these studies was to identify the optimum product formulation to advance into late-phase clinical trials for heavy menstrual bleeding. For study 1, participants received single 1.3-g doses (2 650-mg tablets) of tranexamic acid modified-immediate-release (MIR) and tranexamic acid delayed-release (DR) formulations under fasting conditions compared with nonfasting conditions (after breakfast). For study 2, participants received tranexamic acid MIR or tranexamic acid DR as a single 1.3-g dose followed by a dosage regimen of 1.3 g every 8 hours for 5 days. Plasma tranexamic acid concentrations reached minimum effective levels (≥5 μg/mL) within 1.5 hours and within 3 hours after a 1.3-g tranexamic acid MIR and tranexamic acid DR dose, respectively. Food did not appreciably influence tranexamic acid MIR pharmacokinetics, whereas a high-fat meal significantly lowered the maximum concentration produced with tranexamic acid DR. Peak systemic exposure and maintenance of plasma tranexamic acid concentrations within the therapeutic range (5-15 μg/mL) were optimally achieved with 1.3 g of the MIR formulation dosed every 8 hours. The MIR and DR formulations were well tolerated. Peak-to-trough steady-state performance of the tranexamic acid MIR 1.3-g product (dosed every 8 hours, or 3 times daily, for up to 5 days) supported its advancement to late-phase clinical trials in women with heavy menstrual bleeding.
Clinical Research and Development, Xanodyne Pharmaceuticals, Inc., Newport, KY 41071-4563, USA. kmoore@xanodyne.com
Keith A
KA
Moore
Isabelle
I
Morin
Ted
T
Marenco
Jean R
JR
Lavigne
Gaetano
G
Morelli
D000284:Administration, Oral; D000293:Adolescent; D000328:Adult; D000933:Antifibrinolytic Agents / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D003692:Delayed-Action Preparations; D059305:Diet, High-Fat; D005215:Fasting; D005260:Female; D018565:Food-Drug Interactions; D006801:Humans; D008595:Menorrhagia / Q000188:drug therapy*; D008875:Middle Aged; D013607:Tablets; D013997:Time Factors; D014148:Tranexamic Acid / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use; D016896:Treatment Outcome; D055815:Young Adult
D000933:Antifibrinolytic Agents; D003692:Delayed-Action Preparations; D013607:Tablets; D014148:Tranexamic Acid