Table 1.

Composition of the formulation * used (g).

Formulation	Hydroxypropyl Methylcellulose	Poloxamer 407	L23	Procaine-HCl	Water
A	0.2	2.0	0	1.0	6.8
B	0.2	2.0	0.5	1.0	6.3

* The formulations were stored at 5 °C until the day of usage.