Arzneimittel Forsch
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Arzneimittel Forsch · Jan 2010
Randomized Controlled Trial Comparative StudyDouble-blind comparison of two types of benzocaine lozenges for the treatment of acute pharyngitis.
In a reference-controlled double-blind trial in patients with acute pharyngitis the effects of a newly developed lozenge containing 8 mg of benzocaine (p-aminobenzoic acid ethyl ester, CAS 94-09-7) were compared with those of an identically dosed commercial pastille. 246 patients were randomized to receive either the lozenges (group A, n = 123) or the pastilles (group B, n = 123). Each patient took a total of six doses within 12 h according to the double-dummy principle, with each single dose spaced by 2 h. The primary parameter was the assessment of the responder rate with = 50 % pain relief within 15 min post application. ⋯ One adverse drug reaction was observed in group B (burning and tingling feeling on the tongue), which, however, did not lead to discontinuation of study participation. In all other cases tolerability was stated to be "good to very good". The application of the benzocaine lozenges was statistically non-inferior to the use of the pastilles.
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Arzneimittel Forsch · Jan 2010
Randomized Controlled TrialPharmacokinetics and bioequivalence study of valacyclovir hydrochloride capsules after single dose administration in healthy Chinese male volunteers.
The aim of the present study was to compare the bioavailability of valacyclovir (CAS 124832-26-4; INN: valaciclovir) from two valacyclovir hydrochloride (CAS 214832-27-5) capsules (150 mg/capsule as test preparation and 150 mg/capsule commercially available original capsule of the drug as reference preparation) in 20 Chinese healthy male volunteers, aged between 20 and 27. The study was conducted according to an open, randomized, single blind, 2-way crossover study design with a wash-out phase of 7 days. Blood samples for pharmacokinetic profiling were taken up to 24 h post-dose. ⋯ Bioequivalence between test and reference preparation was demonstrated for both parameters, AUC(0-infinity) and AUC(0-t). The 90% confidence intervals of the T/R-ratios of logarithmically transformed data were in the generally accepted range of 80-125%. It meant that the test formulation was bioequivalent to the reference formulation for valacyclovir hydrochloride.
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Arzneimittel Forsch · Jan 2010
Comparative StudyComparative study of peripheral neurotoxicity after injection of two different paclitaxel formulations in rats.
Paclitaxel Inj. [NK] (test; paclitaxel, CAS 33069-62-4) is a generic version of the drug from the originator (reference). Both drugs contain the same active ingredient and showed identical pharmacokinetics in patients in the previous study; however, these two drugs may have different safety profiles because they contain different inactive ingredients. ⋯ Histopathologically, apparent degeneration of the myelinated fibers in the sciatic and the sural nerves was seen after either the test or the reference injection, compared with after saline injection, but no apparent differences were observed between the two formulations. These results suggest that no significant difference in peripheral neurotoxicity exists between the test and the reference in rats.
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Arzneimittel Forsch · Jan 2010
ReviewThe new generation of intravenous iron: chemistry, pharmacology, and toxicology of ferric carboxymaltose.
An ideal preparation for intravenous iron replacement therapy should balance effectiveness and safety. Compounds that release iron rapidly tend to cause toxicity, while large molecules can induce antibody formation and cause anaphylactic reactions. There is therefore a need for an intravenous iron preparation that delivers appropriate amounts of iron in a readily available form but with minimal side effects and thus with an excellent safety profile. ⋯ Lastly, no evidence of irritation was found in local tolerance studies with FCM. This excellent toxicity profile and the high effectiveness of FCM allow the administration of high doses as a single infusion or bolus injection, which will enhance the cost-effectiveness and convenience of iron replacement therapy. In conclusion, FCM has many of the characteristics of an ideal intravenous iron preparation.