Drug name Average µg/ml Average  % RSD Hydrochlorothiazide 12.60 100.80 0.20% Irbesartan 150.68 100.45 0.26% Losartan potassium 50.24 100.48 0.25% Telmisartan 80.52 100.65 0.21% Valsartan 80.36 100.45 0.26%

Table 2: Repeatability of Hydrochlorothiazide, Irbesartan, Losartan potassium, Telmisartan and Valsartan respectively.