Table 1.

Correlation coefficient and release rate constants of CIM, IBU, and NAP from PLGA microcapsules after fitting to the various release rate equations

Drug	Correlation coefficient (r2)		Rate constant/n value
	Higuchi	Korsmeyer–Peppas	Higuchi, K (h−1)	Korsmeyer–Peppas, n value
CIM	0.6919	0.9879	19.715	0.81
IBU	0.9889	0.9836	11.947	0.41
NAP	0.9474	0.9191	7.472	0.44

Abbreviations: CIM, cimetidine; IBU, ibuprofen; NAP, naproxen; PLGA, poly(d,l-lactide-co-glycolide).