Class of OHA Prescribed

Name of OHA prescribed

Total number of OHA prescribed

Number of drug responsible for secondary failure

% secondary failure

Sulphonylurea

Glimepiride

81

6

7.4

Gliclazide

48

2

4.2

Glibenclamide

3

3

100

Glipizide

6

1

16.7

Total

138

12

8.7

Biguanides

Metformin

160

13

8.1

Thiazolidinediones

Pioglitazone

85

4

4.7

Rosiglitazone

22

2

9.1

Total

107

6

5.6

Alpha-glucosidase inhibitors

Acarbose

15

0

0

Miglitol

12

2

16.2

Total

27

2

7.4