Time
(min)

Atorvastatin

Celecoxib

Atorvastatin

Celecoxib

Atorvastatin

Celecoxib

pH 4

pH 6.8

pH 9

0

115.67

101.47

123.96

127.59

108.63

101.74

30

98.42

98.00

99.07

98.85

99.78

99.04

60

98.87

99.79

98.96

99.23

98.94

98.76

90

98.38

100.64

99.58

98.80

99.36

98.42

120

98.76

100.46

99.32

98.19

99.57

98.67

150

98.52

100.38

99.10

98.84

98.36

98.12

180

98.31

99.45

98.69

98.42

99.17

98.63

Table 7: Interaction studies by RP-HPLC.