Table 2: Linearization coefficients obtained from in vitro release of Ketorolac from SiO2.

ReservoirZero-order
First-order
Higuchi
Hixon-crowel
Hyperbola

Ketorolac SiO2 1 : 80.41830.68090.59800.57120.9651
Ketorolac SiO2 1 : 40.74960.96640.86440.89190.9516

: amount of drug released in time t.
: initial amount of drug in the tablet.
, , , : release rate constants.
b: shape parameter.
a: scale parameter.