Table 2: Particle size of aceclofenac niosomal formulations.

Formulation code	Surfactant used	(Surfactant :Cholesterol) weight ratio	Particle size (μm)
N-1	Span 20	0.5:0.5	1.22 ± 0.12
N-4		0.5:1	1.71 ± 0.13
N-16		1:0.5	1.09 ± 0.25
N-6	Span 60	0.5:0.5	15.5 ± 0.65
N-9		0.5:1	22.39 ± 0.82
N-17		1:0.5	5.5 ± 0.35
N-11	Span 80	0.5:0.5	3.11± 0.53
N-14		0.5:1	3.32 ± 0.42
N-18		1:0.5	2.96 ± 0.98