Alprazolam

A new Reverse Phase High Performance Liquid Chromatographic (RP-HPLC) method has been developed for estimation of Paracetamol and Alprazolam in bulk and tablet dosage forms using UV-detector. A RP Cell Pack C18 column (250 mm × 4.6 mm, 5 µ particle size) using acetonitrile and water (80:20 % V/V) as mobile phase by maintaining flow rate of 1 mL/min at 236 nm as detection wavelength. The peaks were eluted at 4.8 and 6.2 mins for Paracetamol and Alprazolam, respectively. The method was validated in accordance with ICH guidelines, the linearity curve for Paracetamol was obtained over the range of 50-175 µg/mL, and it was found to be linear with y = 1961x + 9226 (r2 = 0.999). The linearity curve for Alprazolam was obtained over the range of 0.25-1.5 µg/mL and was found to be linear with y =23328x + 939.3 (r2 = 0.998). The percentage recoveries were found to be 99-101% and 99-102%, respectively. The system suitability parameters such as number of theoretical plates and tailing factor were found to be 7242, 1.56 for PAR and 6755, 1.15 for ALP. Hence the developed RP-HPLC method was found to be simple, accurate, economical, rapid and can be applied for routine analysis of these drugs in their combined formulations.

Alprazolam (ALP) is benzodiazepine derivative which produce symptomatic relief of anxiety and tension state resulting from a stressful enviourment or emotional factors. The First method was based on simultaneous equation method.  In the proposed simultaneous equation method, the signals were measured at 222.0 nm and 227.0 nm corresponding to the absorbance maxima of ALP and FLU in methanol.  The method was validated statistically.  Recovery study was performed to confirm the accuracy of the method.  This method is suitable technique for the reliable analysis of commercial formulation containing combination of ALP and FLU.  Simplicity, sensitivity and rapidity of simultaneous equation method render it suitable for routine analysis for ALP and FLU from their combination dosage forms. The Second method was based on absorbance ratio method (Q. analysis).  The absorbance was measured at two-wave lengths 222.0 nm (max) of ALP and 227.0 nm, which is an isoabsorptive point, were found adequate for quantification.  The method is validated statistically. The recovery more than 99% with low SD suggests the accuracy of the method. In addition, the above-proposed UV spectroscopic methods are simple, easy to apply, low cost, does not use polluting reagents and requires relatively inexpensive instruments.