Table 1.

Composition of hydrogels

Formulations	Components
	Chitosan (2.5%)	Lactic acid (1%)	Nanocapsule suspension	Hydroalcoholic solution	Capsaicinoids
CH-NC-CP	x	x	x		x
CH-NC	x	x	x
CH-ET-CP	x	x		x	x
CH-ET	x	x		x

Note: x, used in the formulation preparation.

Abbreviations: CH, chitosan gel; NC, nanocapsules; CP, capsaicinoids; ET, ethanolic solution.