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  • 1975-1979  (5)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Pharmacy world & science 1 (1979), S. 629-648 
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Samenvatting Chronische aspecifieke respiratoire aandoeningen (Cara) behoren tot de meest voorkomende ziektebeelden in ons land en vereisen veelal een intensieve medicamenteuze therapie. In onderstaand overzicht zal worden getracht enige achtergrondinformatie te geven over de vele verschillende vormen waarinCara zich kan manifesteren. Bovendien zullen enige richtlijnen worden gegeven voor een rationele farmacotherapie bij de diverse vormen vanCara.
    Notes: Abstract Chronic obstructive lung diseases (Cold; in Dutch:Cara) belong to the most frequently encountered diseases in the Netherlands and often require intensive medical treatment. The aim of this review is to give some background information about the several forms ofCold and moreover to give some suggestions for a rational therapy for the special forms ofCold.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Pharmacy world & science 1 (1979), S. 997-1001 
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Samenvatting Met behulp van plasmaconcentratiemetingen werd de biologische beschikbaarheid bepaald na orale en rectale toediening van de quaternaire ammoniumverbinding thiazinamiummethylsulfaat aan CARA-patiënten. Na orale toediening van een gecoate tablet Multergan forte® (bevattende 300 mg van de werkzame stof, berekend als base) werd een biologische beschikbaarheid van 3,6±1,7% (S.D.) van de dosis gevonden gedurende de eerste 7 uren na toediening. Na extrapolatie werden hogere waarden gevonden. Het maximum in de plasmaconcentratie/tijd-curve werd na ongeveer 2,5 uur gevonden en bedroeg gemiddeld 73±27 ng/ml (S.D.) en resulteerde in de meeste gevallen in een aanzienlijke vermindering van de aanwezige bronchusobstructie. Na rectale toediening van 150 mg thiazinamiummethylsulfaat (berekend als base) in Witepsol H15 suppositoria werd een biologische beschikbaarheid van 5,8±3,2% (S.D.) van de dosis gevonden. De maximale plasmaconcentratie werd nu eerder bereikt namelijk na ongeveer 1 uur en bedroeg gemiddeld 103±89ng/ml (S.D.). Deze curve daalde sneller dan die na orale toediening. In het algemeen werden met deze toedieningswijze therapeutische plasmaconcentraties bereikt.
    Notes: Abstract Bioavailability was determined by measuring plasma concentrations after oral and rectal administration of the quaternary ammonium compound thiazinamium methylsulphate to patients suffering from generalized obstructive lung disease. After oral application of a coated tablet of Multergan forte® (containing 300 mg of the drug, expressed as base) a bioavailability of 3.6±1.7% (S.D.) of the dose was found during the first seven hours after administration. After extrapolation higher values were found. The maximum in the plasma concentration curve was found. after 2.5 hours and accounts for 73±27 ng/ml (S.D.) resulting in most cases in a considerable bronchodilating effect. After rectal administration of 150 mg of the drug (calculated. as the base) in Witepsol H15 suppositories a bioavailability of 5.8±3.2% (S.D.) of the dose was found. The maximum in the plasma concentration/time-curve was reached earlier,i.e. after approx. 1 hour and accounted for 103 ± 89 ng/ml (S.D.). This curve declined faster than after oral administration. In general, therapeutic plasma levels were reached by this route of administration.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Pharmacy world & science 1 (1979), S. 291-293 
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In order to investigate whether administration of an otherwise poorly absorbed drug as an ion pair would improve bioavailability, the disposition of the quaternary ammonium compound thiazinamium was studied in humans. For the ion pair, salicylate was selected as counter ion. The bioavailability was estimated by measuring the amount of unchanged drug excreted in urine during a period of 36 hours. The results were compared with those obtained in the same subject after administration of the salt thiazinamium methylsulphate as reference substance. After oral administration absorption of the salicylate was found to be slightly better than that of the reference substance. These results suggest that administration of thiazinamium as ion pair would offer slight advantages over administration as a salt, but not to a degree that would be therapeutically significant.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-739X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In this study we have investigated to what extent the concept of ‘ion pair’ absorption is valid after administering the quaternary ammonium ion thiazinamium rectally to humans. Salicylate has been selected as counter ion. The bioavailability was estimated by determining the amount of unchanged drug excreted in urine over a period of 24 hours. The ion pair was administered either alone or in the presence of an excess of counter ions. The results were compared with those obtained after giving the drug as the completely ionized salt thiazinamium methylsulphate. In addition, ‘in vivo’ ion pair formation was studied. Both the ion pair and the salt were administered in two suppository bases, namely a lipophilic (Witepsolh15) and a hydrophilic one (a polyethylene glycol mixture). Absorption after rectal administration of the ion pair was found to be of the same order of magnitude as that found with the salt. So, administration in suppositories of thiazinamium as salicylate ion pair would offer only slight advantages over administration of the salt.
    Type of Medium: Electronic Resource
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