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. 2012 Jun 29;7:3167–3189. doi: 10.2147/IJN.S30190

Table 2.

Estimated Peppas parameters as a function of drug loading percentages and loading techniques

Drug loading In-situ drug loading Freeze-drying drug loading


Release rate constant (K, day−1) Regression coefficient (R2) Release index (n) Release rate constant (K, day−1) Regression coefficient (R2) Release index (n)
2% 5-FU 58.75 ± 4.32 0.87 0.23 ± 0.03 66.22 ± 2.94 0.91 0.18 ± 0.02
3% 5-FU 56.78 ± 3.80 0.88 0.22 ± 0.03 67.39 ± 1.55 0.95 0.14 ± 0.01
5% 5-FU 64.08 ± 1.93 0.92 0.14 ± 0.01 94.73 ± 1.55 0.96 0.15 ± 0.02

Abbreviation: 5-FU, 5-fluorouracil.