ABSTRACT
Diclofenac sodium is a non-steroidal anti-inflammatory drug (NSAID) taken to reduce inflammation and as an analgesic reducing pain in certain conditions. Tolperisone hydrochloride is a piperidine derivative, is a centrally-acting muscle relaxant. Two simple, accurate and economic methods; Q analysis and first order derivative method have been described for the simultaneous spectrophotometric estimation of Diclofenac sodium and Tolperisone hydrochloride in tablet dosage form. Absorption maxima of Diclofenac sodium and Tolperisone hydrochloride in distilled water were found to be 275.0 nm and 260.0 nm respectively. Beer’s law was obeyed in the concentration range 5-50 μg/ml for Diclofenac and 5-60 μg/ml for Tolperisone hydrochloride. In Q analysis method, absorbances were measured at the selected wavelengths, 237.0 nm (isoabsorptive point) and 260.0 nm (λmax of Tolperisone). In first order derivative method, zero crossing point of Diclofenac sodium and Tolperisone hydrochloride were selected at 275.0 nm and 260.0 nm respectively. The analysis of binary pharmaceutical formulation was carried by both methods. Results of two methods were validated statistically by recovery studies and were found to be satisfactory.
ABSTRACT
A simple, rapid, reproducible, accurate and precise Reverse Phase HPLC method was developed for the quantitative simultaneous estimation of Drotaverine hydrochloride and Paracetamol in combined tablet dosage form. Drotaverine hydrochloride is an analog of papaver and is used mainly as an antispasmodic, smooth muscle relaxant. Paracetamol has analgesic and antipyretic activity. The chromatographic separation of both drugs was achieved with 250 x 4.6 mm, i.d 5 μm C-18 column using Methanol: water pH adjusted to 4.0 with O- Phosphoric acid. (60:40 v/v) at the flow rate of 1ml/min. The measurements were made at 243.0 nm using UV detector. The linearity range was found to be 5-80 μg/ml for Drotaverine hydrochloride and 5-70 μg/ml for Paracetamol. The coefficient of correlation for Drotaverine hydrochloride and Paracetamol was found to be 0.9994 and 0.9990 respectively. The retention time for Drotaverine hydrochloride and Paracetamol were 4.562 min and 8.146 min, respectively. The tailing factor for Drotaverine hydrochloride and Paracetamol was found to be 1.12 and 1.18 respectively. The percent recoveries obtained for Drotaverine hydrochloride and Paracetamol were found to be 99.85 and 99.92 respectively. The relative standard deviation for intraday and interday precision in tablet was always less than 2%. The method was validated for linearity, range, precision, accuracy, specificity, selectivity, intermediate precision, ruggedness, robustness, stability and suitability.
ABSTRACT
Esomeprzole and naproxen are available in tablet dosage form in the ratio 1:25. Two simple, accurate, precise and economic methods; simultaneous equation method and multicomponent method have been described for the simultaneous estimation of esomeprzole and naproxen in tablet dosage form. Absorption maxima of esomeprzole and naproxen in distilled water were found to be 301.0 nm and 262.0 nm respectively. Beer’s law was obeyed in the concentration range 5-50 μg/ml for esomeprzole and 5-50 μg/ml for naproxen. The methods allow rapid analysis of binary pharmaceutical formulation with accuracy. Results of two methods were validated statistically and by recovery studies and were found to be satisfactory.