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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 15 (1979), S. 69-71 
    ISSN: 1432-1041
    Keywords: phenytoin ; dialysis encephalopathy ; protein binding ; continuous ultrafiltration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Protein binding of phenytoin was assessed in one patient with dialysis encephalopathy before and after haemodialysis. Phenytoin concentrations were measured by radioimmunoassay and continuous ultrafiltration was used to assess phenytoin binding. At a serum concentration of 60 µmol.1−1 the percentage of phenytoin bound to serum albumin was considerably lower in the patient serum (79.95% predialysis; 92.09% postdialysis) than that in three normal sera (97.90±0.17%). Analysis of Scatchard plots indicated two classes of binding sites. In class I both the affinity and capacity for binding phenytoin were reduced in the pre and post-dialysis serum, whereas in class II the capacity of the uraemic serum was increased although the intrinsic association constant was greatly reduced. It was concluded that in vivo haemodialysis is associated with large fluctuations in the protein binding of phenytoin, in which the concentration of endogenous dialysible metabolites are strongly implicated.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 14 (1978), S. 231-235 
    ISSN: 1432-1041
    Keywords: Clonidine ; tiamenidine ; salivary flow ; blood pressure ; sedation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary An established method for collecting uncontaminated parotid saliva has been applied to assessment of salivary flow rate. Following single doses of 0.3 mg clonidine and 1.0 mg tiamenidine (HOE 440) changes in blood pressure, heart rate, sedation (assessed by a self-rating scale) and salivary flow were followed in nine normal subjects. Both drugs produced a fall in systolic and diastolic blood pressure, sedation, depression of salivary flow and a lowering of heart rate. These changes were maximal between 2 and 6 h and were more marked after clonidine than after timenidine. As tiamenidine 1.0 mg did not produce a hypotensive effect equivalent to clonidine 0.3 mg direct comparison of side-effects attributable to these agents proved difficult. The evidence suggests, however, that tiamenidine would cause sedation and reduction in salivary flow comparable to clonidine if given in an equivalent hypotensive dose.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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