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  • Title: Pharmacokinetics and pharmacodynamics of a premixed formulation of soluble and protamine-retarded insulin aspart.
    Author: Jacobsen LV, Søgaard B, Riis A.
    Journal: Eur J Clin Pharmacol; 2000 Aug; 56(5):399-403. PubMed ID: 11009049.
    Abstract:
    OBJECTIVE: With the aim to obtain a premixed rapid-acting insulin with a serum insulin profile more closely resembling the endogenous meal-stimulated serum insulin profiles, a 30/70 (rapid/intermediate-acting) premixed suspension of the rapid-acting insulin analogue insulin aspart (BIAsp30) was compared with a similar premixed suspension of biphasic human insulin 30/70 (BHI30) after a single subcutaneous injection. METHODS: The study had a randomised, double-blind, two-period crossover design. Twenty-four healthy male subjects received a single subcutaneous dose of either 0.2 U x kg(-1) bodyweight of BIAsp30 or BHI30 on two study days. RESULTS: BIAsp30 was absorbed faster than BHI30, as reflected in the area under the insulin concentration-time curve from 0 to 90 min after dosing [AUC(0-90 min)]. This was significantly larger for BIAsp30 than for BHI30 (1403 +/- 372 versus 752 +/- 191 mU x l(-1) x min(-1) [mean +/- SD]; P < 0.0001). Furthermore, the time to maximum serum insulin concentration (tmax) of BIAsp30 was approximately half the tmax of BHI30 (60 [45-70] versus 110 [90-180] min [median, interquartile range]; P=0.0001) and the maximum insulin concentration (Cmax) was significantly higher for BIAsp30 than for BHI30 (23.4 +/- 5.3 versus 15.5 +/- 3.7 mU x l(-1) [mean +/- SD]; P < 0.0001). The serum glucose profiles showed a significantly earlier onset of the glucose-lowering effect following BIAsp30 than following BHI30. CONCLUSIONS: The improved absorption properties of soluble insulin aspart in its premixed formulation provide a basis for a more efficient meal-related glucose control and immediate pre-meal delivery when compared with a similar human premixed insulin in the treatment of diabetes mellitus.
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