Table 1.

Different formulation prepared of theophylline hydrogels.

Sl. No	Ingredient	F1	F2	F3	F4	F5
	↓ Ratio →	1 : 1	1.25 : 1	1.5 : 1	1.75 : 1	2 : 1
1	Theophylline (mg)	300	300	300	300	300
2	Carboxymethylchitosan (mg)	1000	1250	1500	1750	2000
3	Carbopol 934 (mg)	1000	1000	1000	1000	1000
4	Distilled water (mL)	25	25	25	25	25
5	1.75 M Acetic acid (mL)	25	25	25	25	25