Table 2. Values of gelation temperature (n = 3), gelling capacity (n = 3), pH (n = 4), viscosity (n = 4), drug content (n = 3), and score of clarity (n = 3).

Formulation	Gelling capacity	Gelling temperature (°C)	Clarity	pH	Viscosity (cP)	Drug content (%)
N1	###	35.167 ± 0.289A	+	7.095 ± 0.013B	422.425 ± 0.846D*	98.686 ± 0.315B
N2	###	32.500 ± 0.500B	+	7.085 ± 0.013B	883.750 ± 3.676C*	97.697 ± 0.116C
N3	###	32.000 ± 0.000B	+	7.093 ± 0.036B	1196.250 ± 4.272B*	97.072 ± 0.075D
N4	###	30.000 ± 0.000C	+	7.198 ± 0.005A	3622.500 ± 15.000A**	100.348 ± 0.046A

Values are expressed as mean ± standard deviation.

^A-DWithin each column, values not sharing a common superscript letter differ significantly (one-way ANOVA followed by Tukey’s multiple comparisons test, p < 0.05). Letters are assigned in descending order of the mean and are independent for each column. Gelling capacity and clarity were scored qualitatively and were identical for all formulations; therefore no statistical comparison was performed for these parameters.

#, gel developed after a short delay but quickly liquefied; ##, gel formed instantly and lasted for several minutes; ###, rapid gel formation that remained intact for approximately one hour.

+++, very clear (glassy); ++, clear; +, turbid.

*measured at 60 rpm; **measured at 10 rpm. These symbols denote the rotational speed of the measurement only and carry no statistical meaning.

ANOVA, analysis of variance.