Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 11 (1977), S. 219-224 
    ISSN: 1432-1041
    Keywords: Nortriptyline ; 10-OH-nortriptyline ; bioavailability ; plasma metabolites ; first pass metabolism ; oral dose ; intramuscular dose
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Nortriptyline was given orally and intramuscularly to six depressed patients. Plasma concentrations of parent drug and the unconjugated and conjugated principal metabolite, 10-hydroxynortriptyline, were determined by mass fragmentography. There was a significant decrease in the area under the nortriptyline plasma concentration — time curve after the oral route of administration, whilst the elimination rate was unchanged. With the oral dose, plasma concentrations of the metabolites were higher and peaked earlier than after intramuscular administration, whilst the opposite was true for the parent compound. This proves that the difference in bioavailability between the two routes of administration was due to first pass metabolism. As determined from the ratio between corresponding areas, the relative bioavailability of the oral dose was 66±21 S.D. per cent. This fraction is higher than that reported previously when intravenous nortriptyline was used as the reference dosage form.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1432-1335
    Keywords: Ifosfamide ; Dose fractionation ; Ambulatory pump
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Dose fractionation is known to reduce the toxicity of ifosfamide and also results in an increased production of alkylating metabolites. Administration by slow infusion using the convenience of ambulatory pumps is therefore of interest. We used HPLC to investigate the stability of ifosfamide in aqueous solution (either alone, solution A, or mixed with mesna, solution B) under various conditions over a 9-day period. At both ambient temperature in daylight and 27° C in a dark environment, there was no evidence of ifosfamide decay in either solution. However, at 37° C in a dark environment, a fall was detected in both solutions, which at 9 days amounted to a loss of 7% of the amount of ifosfamide present at time zero. At 70° C, levels of ifosfamide in both solutions fell within 72 h to markedly lower levels than controls, thus confirming that the methods used were indicative of stability. We conclude that ifosfamide, either alone or mixed with mesna, is stable for 9 days at temperatures up to 27° C; even at 37° C, the measured loss is small. The continuous infusion of ifosfamide over 7 days by ambulatory pump is now a practical proposition.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...