Amlodipine

Hydrochlorothiazide

Losartan

Telmisartan (IS)

Retention time (min)

Peak area

Retention time (min)

Peak area

Retention time (min)

Peak area

Retention time (min)

Peak area

Mean

3.7

114,310

2.5

21,898

3.9

227,792

3.8

12,463

SD

0.0209

1783.6

0.0263

322.362

0.0268

1454.681

0.0081

165.480

RSD

0.566

1.560

1.039

1.472

0.6845

0.6385

0.2152

1.3277