| Groups |
Percentage ( No) |
| Subtherapeutic |
Therapeutic |
Toxic |
| Trough
Level |
Peak
Level |
Trough
Level |
Peak
Level |
Trough
Level |
Peak
Level |
| Group I (1 month) |
49.5(44) |
65.5 (30) |
43.8 (39) |
13 (6) |
6.7(6) |
21(10) |
| Group II (2-4 months) |
51.8 (43) |
52 (21) |
42.4 (35) |
28 (11) |
5.8(5) |
20 (8) |
| Group III (4 -6 months) |
46.2 (40) |
54.3(19) |
46.2(40) |
16.3 (6) |
7.6(7) |
29.4 (10) |
| Group IV (6-8 months) |
38.1 (24) |
46.6 (15) |
50.8 (32) |
34.7 (11) |
11.1(7) |
18.7 (6) |
| Group V (8-10 months) |
53.5 (38) |
54.2 (13) |
43.7 (31) |
12.5 (3) |
2.8 (2) |
33.3 (8) |
| Group VI (10-12 months) |
50.8 (30 ) |
56.7 (17) |
47.6 (29) |
2 0 (6) |
1.6 (2) |
23.3 (7) |
| Group VII (>12 months) |
45.6(31) |
55.6 (15) |
45.6 (31) |
22.2 (6) |
8.8 (6) |
22.2 (5) |
*289 referral blood samples for both trough and peak levels–233 referral blood
samples for trough level only (total referral blood samples 522). |
