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  • pinacidil  (2)
  • Protein binding  (1)
  • urinary excretion  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 26 (1984), S. 603-608 
    ISSN: 1432-1041
    Keywords: pinacidil ; hypertension ; pinacidil pyridine-N-oxide ; urinary excretion ; protein binding ; pharmacokinetics ; healthy volunteers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Preliminary investigation in 3 healthy volunteers suggested that intravenous pinacidil in a dose of 0.2 mg/kg had a potent but well-tolerated hypotensive action in the supine position. Facial flushing, uncomfortable chest sensation and distressing postural hypotension occurred at serum concentrations above 300 ng/ml. Pinacidil, 0.2 mg/kg, was given intravenously over 4 min to 15 healthy volunteers in the supine position. Maximum fall in mean arterial pressure (MAP) was 15.7±6.0 mmHg. Maximum rise in heart rate was 23.8±6.6 beats/min. Pinacidil serum distribution half-life ( $${\text{T}}_{{\raise0.7ex\hbox{${\text{1}}$} \!\mathord{\left/ {\vphantom {{\text{1}} {{\text{2}}\alpha }}}\right.\kern-\nulldelimiterspace}\!\lower0.7ex\hbox{${{\text{2}}\alpha }$}}}$$ ) was 13.4±8.5 min and elimination half-life ( $${\text{T}}_{{\raise0.7ex\hbox{${\text{1}}$} \!\mathord{\left/ {\vphantom {{\text{1}} {{\text{2}}\beta }}}\right.\kern-\nulldelimiterspace}\!\lower0.7ex\hbox{${{\text{2}}\beta }$}}}$$ ) was 2.13±0.49 h. The apparent volume of distribution (Vdβ) was 90.3±13.21 and total body clearance was 31.1±9.61/h. Pinacidil was approximately 40% bound to plasma protein over the concentration range 40–400 ng/ml. Urinary excretion of unchanged pinacidil accounted for 5.7 ± 1.3% of the administered dose over 24 hours and urinary excretion of the major metabolite, pinacidil pyridine-N-oxide, was 31.6±9.2% of the administered dose. It was concluded that intravenous pinacidil is a potent vasodilator hypotensive compound, with a duration of action between 1.5 and 2 h.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 35 (1988), S. 93-95 
    ISSN: 1432-1041
    Keywords: pinacidil ; pinacidi pyridine-n-oxide ; accumulation ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effects of acute and chronic administration of a slow-release preparation of pinacidil have been studied in eight normotensive volunteers aged 40–57 years. Continuous administration of 20 mg b.i.d. pinacidil had no effect on serum pinacidil concentrations measured as AUC (0–9 h), but accumulation of the principal metabolite, pinacidil pyridine-N-oxide was found to occur. There were no significant changes in erect and supine blood pressure and heart rate from the pretreatment levels on days 1,15 or 29. Chronic administration of pinacidil caused a significant increase in weight over the total period of study. There were also significant changes in mean sodium (+2.38 mmol/l) and alkaline phosphatase (+15.75 iU/l) from the start to the end of pinacidil therapy but values were within the normal ranges, except for one alkaline phosphatase. There were significant changes in the following haematological parameters over the period of pinacidil therapy; leukocytes (−1.49 × 109/l), haemoglobin (−0.56 g/dl), MCH (−1.1 pg), MCHC (−1.22 g/dl), platelet MCV (−0.90 fl).
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 38 (1990), S. 93-95 
    ISSN: 1432-1041
    Keywords: Glibenclamide ; Metolazone ; Protein binding ; Displacement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effects of metolazone on the protein binding of glibenclamide were studied. It was found that increasing metolazone concentrations up to 100 ng/ml had no significant effect on the protein binding of glibenclamide studied at 10 μg/ml. Metolazone is unlikely to cause a clinically significant increase in the free fraction of glibenclamide in patients receiving both drugs.
    Type of Medium: Electronic Resource
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