Drug name Recovery at 80% conc. (%) Recovery at 100% conc. (%) Recovery at 120% conc. (%) Average Recovery (%) RSD Hydrochlorothiazide 100.50 100.84 100.22 100.52 0.31% Irbesartan 100.18 100.62 100.37 100.39 0.22% Losartan potassium 100.23 101.66 100.36 100.75 0.78% Telmisartan 101.48 100.80 99.58 100.62 0.96% Valsartan 100.63 100.63 100.21 100.49 0.24%

Table 4: Recovery results for standard solution plus excipients for Hydrochlorothiazide, Irbesartan, Losartan potassium, Telmisartan and Valsartan respectively.