title: Long-acting octreotide and prolonged-release lanreotide formulations have different pharmacokinetic profiles.
abstract: Single-dose pharmacokinetic (PK) profiles and multiple-dose PK modeling were compared for long-acting octreotide (20 or 60 mg) and prolonged-release lanreotide (90 or 120 mg) over 91 days; steady-state profiles were simulated. All treatments were well tolerated. Octreotide 20-mg profile showed increased concentration on day 1, lag from days 2 to 6, then prolonged plateau phase (days 11-41); 60-mg PK was dose proportional. Lanreotide 90-mg profile showed C(max) on day 1 then elimination (apparent t1/2 25.5 days); 120-mg profile was underproportional. Steady-state PK of octreotide 20 mg/28 d suggested a C(mean) of 1216 rhog/mL (range, 1065-1585) with low fluctuation index (43%). Steady-state PK of lanreotide 90 mg/28 d suggested a C(mean) of 4455 rhog/mL (range, 2499-9279) with high fluctuation index (152%). Long-acting octreotide had more predictable PK than prolonged-release lanreotide. Simulated steady-state profiles suggest long-acting octreotide could be optimized to meet individual patient needs. In contrast, prolonged-release lanreotide requires exposure constantly above the therapeutic target to enable monthly long-term therapy.
authors.affiliation: Biotrial, France.
authors.forename: Beatrice
authors.initials: B
authors.lastname: Astruc
authors.forename: Peter
authors.initials: P
authors.lastname: Marbach
authors.forename: Hakim
authors.initials: H
authors.lastname: Bouterfa
authors.forename: Caroline
authors.initials: C
authors.lastname: Denot
authors.forename: Mitra
authors.initials: M
authors.lastname: Safari
authors.forename: Alessandra
authors.initials: A
authors.lastname: Vitaliti
authors.forename: Michael
authors.initials: M
authors.lastname: Sheppard
mesh_terms: D015746:Abdominal Pain / Q000209:etiology; D000293:Adolescent; D000328:Adult; D018931:Antineoplastic Agents, Hormonal / Q000008:administration & dosage / Q000009:adverse effects / Q000097:blood / Q000493:pharmacokinetics*; D003692:Delayed-Action Preparations; D003967:Diarrhea / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D015282:Octreotide / Q000008:administration & dosage / Q000009:adverse effects / Q000097:blood / Q000493:pharmacokinetics*; D010456:Peptides, Cyclic / Q000008:administration & dosage / Q000009:adverse effects / Q000097:blood / Q000493:pharmacokinetics*; D013004:Somatostatin / Q000008:administration & dosage / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000097:blood / Q000493:pharmacokinetics
chemical_list: D018931:Antineoplastic Agents, Hormonal; D003692:Delayed-Action Preparations; D010456:Peptides, Cyclic; C060347:lanreotide; D013004:Somatostatin; D015282:Octreotide