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  • Title: Dyphylline elimination kinetics in lactating women: blood to milk transfer.
    Author: Jarboe CH, Cook LN, Malesic I, Fleischaker J.
    Journal: J Clin Pharmacol; 1981 Oct; 21(10):405-10. PubMed ID: 7309903.
    Abstract:
    A population of 20 normal lactating females between the ages of 20 and 35 years was treated with a single 5 mg/kg intragluteal dose of dyphylline, 7-(2,3-dihydroxypropyl)theophylline. The distribution of the drug between blood and milk and its pharmacokinetics of elimination were determined. The apparent volume of distribution (Vd) of dyphylline was found to be 0.505 +/- 0.162 l./kg, the elimination rate constant (Kel) was 0.228 +/- 0.055 hr-1, the biological half-life (t1/2) was 3.21 +/- 0.76 hr, and the total body clearance (CI) was 0.109 +/- 0.036 l./kg/hr. The ratio described by dyphylline distribution between milk and serum (M/S) was 2.08 +/- 0.52. The elimination rate from milk was equivalent to that from blood.
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