Table 1.

Composition of the sildenafil citrate microemulsion-loaded hydrogel formulations.

Ingredients	Formulations and Amount (g)
	Isopropyl Myristate-Based System	Oleic Acid-Based System
Sildenafil citrate	0.24	0.24
Isopropyl myristate	0.60	-
Oleic acid	-	0.44
Tween 80	0.80	0.87
Polyethylene glycol 400	0.40	-
Propylene glycol	-	0.43
Purified water	0.20	0.26
Poloxamer 188 (10% solution)	0.50	0.50
Total weight	2.74	2.74