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  • Title: Acute effect of hydrochlorothiazide on renal calcium and magnesium handling in postmenopausal women.
    Author: Stefíková K, Spustová V, Dzúrik R.
    Journal: Physiol Res; 1999; 48(4):327-30. PubMed ID: 10638687.
    Abstract:
    A single 50 mg dose of hydrochlorothiazide (HCTZ) decreases the urinary excretion of calcium (U(Ca)V), clearance (C(Ca)) and fractional excretion (FE(Ca)) of calcium. This is accompanied by an increase of total calcium and ionized calcium (Ca2+) concentrations in the serum. On the other hand, HCTZ increases fractional excretion of magnesium (FE(Mg)) and decreases serum Mg2+ concentrations. Moreover, HCTZ decreases markedly clearance of phosphate (C(Pi)) and fractional excretion of phosphate (FE(Pi)) and increases serum phosphate (Pi) concentrations in healthy postmenopausal women. It is concluded that intrinsic renal cellular control promptly uncouples calcium and magnesium tubular reabsorption even without K+ depletion.
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