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Percentage compositions of THN, P-407, STA, and HPMC in the fourth-series controlled-release matrix system formulations.
| Formulations | THN (%) | P-407 (%) | HPMC (%) | STA (%) | Total Weight (mg) |
|---|---|---|---|---|---|
| F13 | 30 | 30 | 20 | 20 | 1000 |
| F14 | 30 | 30 | 15 | 25 | 1000 |
| F15 | 30 | 30 | 10 | 30 | 1000 |
| F16 | 30 | 30 | 5 | 35 | 1000 |
