This study used a crossover design consisting of 2 treatments, 2 sequences and 2 periods. Study Period-I and IT were separated by a washout period of 14 days. Use of a crossover design is appropriate since it enables comparison of treatments within the same subject using intrasubject variability thus improving the precision of treatment comparisons. Also use of 14 days of washout period between successive drug administrations eliminates chances of residual drug being present at preceding period (i.e Period 1) to next period (i.e Period II).