No abstract

A simple, sensitive and specific liquid chromatography–tandem mass spectrometry (LC–MS/MS) method was developed for the quantification of milnacipran (MC) in rat plasma by using the liquid–liquid extraction method. Milnacipran-d10 (MCD10) was used as an internal standard (IS). Chromatographic separation was achieved on Zorbax SB-CN (4.6 mm×75 mm, 3.5 µm) column with an isocratic mobile phase composed of 10 mM ammonium acetate (pH 4.0) and methanol in the ratio of 25:75(v/v), at a flow-rate of 0.7 mL/min. MC and MCD10 were detected with proton adducts at m/z 247.2→230.3 and m/z 257.2→240.4 in multiple reaction monitoring (MRM) positive mode respectively. The method was validated over a linear concentration range of 1.00–400.00 ng/mL with a correlation coefficient (r2)≥0.9850. This method demonstrated intra- and inter-day precision within 5.40–10.85% and 4.40–8.29% and accuracy within 97.00–104.20% and 101.64–106.23%. MC was found to be stable throughout three freeze–thaw cycles, bench top and postoperative stability studies. This method was successfully applied to a pharmacokinetic study of rats through i.v. administration.

No abstract

ICH-international council for harmonization of technical requirements for pharmaceuticals for human use (ICH) is unique in bringing together the regulatory authorities and pharmaceutical industry to discuss scientific and technical aspects of drug registration. ICH mission is to achieve greater harmonization worldwide to ensure that safe, effective and high quality medicines are developed and registered in the most resource -efficient manner. Harmonization achievements in quality area include pivotal milestone such as the conduct of stability studies, defining relevant thresholds for impurities testing and a more manufacturing practice (GMP) risk management.

Accurately 10 mg of Tigecycline pure drug was weighed and transferred into a 10 ml volumetric flask. The volume was made up to the mark using Acetonitrile (ACN) resulting in 1000 μg/ml concentration primary stock solution. From this 1 ml aliquot was transferred into a 10 ml volumetric