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  • Title: Sandostatin LAR in acromegalic patients: a dose-range study.
    Author: Fløgstad AK, Halse J, Haldorsen T, Lancranjan I, Marbach P, Bruns C, Jervell J.
    Journal: J Clin Endocrinol Metab; 1995 Dec; 80(12):3601-7. PubMed ID: 8530606.
    Abstract:
    Sandostatin LAR is a sustained release formulation of octreotide that has been developed by microencapsulating the drug with biodegradable poly(lactide-glycolide)-glucose. We have investigated the efficacy and tolerability of Sandostatin LAR given as a single dose im to patients with active acromegaly who showed good GH suppression during a 2- to 4-week pretreatment period with octreotide given sc. Two double blind studies were performed. Initially, 14 patients were randomized and observed over 42 days after a single im injection of 3, 6, 9, or 12 mg Sandostatin LAR. In the second study, 15 patients were randomized and observed over 60 days after a single im injection of either 20 or 30 mg Sandostatin LAR. Assessments of 12-h GH and octreotide profiles and adverse events were made on day -14 (during treatment with Sandostatin, sc); day 0 (off treatment after wash-out period); days 1, 7, 14, 21, 28, 35, and 42; and, for study 2, also on days 49 and 60 after the im injection. Only injections of 20 or 30 mg were followed by a suppression of basal GH and insulin-like growth factor I to levels comparable to those seen during sc treatment. The suppression of mean GH to less than 5 micrograms/L lasted for 4 weeks in the group receiving 20 mg and for at least 6 weeks in those given 30 mg Sandostatin LAR. The pharmacokinetic profile fitted a biphasic drug release model previously described for peptides in similar drug delivery systems. Serum concentrations correlated with the im administered dose. Suppression of GH and insulin-like growth factor I was achieved at serum octreotide concentrations exceeding approximately 600 ng/L. Tolerability was good. Sandostatin LAR holds promise as a valuable drug for the treatment of acromegaly. The results of ongoing long term studies will provide further necessary knowledge of the drug.
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