Table 2: List of the drugs delivered through IPN based hydrogel.

S.No.	Name of Polymers	Cross-linker	Drug	Formulation	Reference
1.	Chitosan + Polyvinyl pyrrolidone	Glutaraldehyde	Clarithromycin	Semi-IPN Hydrogel	[53]
2.	Polydimethylsiloxane / polyethylene glycol + chitosan	Hexamethylene-1,6-di-amino carboxysulfone	-	Semi-IPN Hydrogel	[43]
3.	Gelatin + Methacrylic acid	Glutaraldehyde and Methylene bisacrylamide	Glipizide	IPN Hydrogel	[54]
4.	Chitosan + Polyvinyl pyrrolidone + Polyacrylic acid	Glutaraldehyde and N,N-methylene bisacrylamide	Clarithromycin	IPN Hydrogel	[55]
5.	Methacrylic acid + Polyethylene glycol	Tetra Ethyleneglycoldimethacrylate	Atorvastatin, Theophyllin	Hydrogel	[3]
6.	Locust bean gum (Carboxymethyl sulfate derivative)	-	Tramadol HCl	Hydrogel Beads	[56]
7.	Chitosan + Polyanilin	Glutaraldehyde	-	Semi-IPN Hydrogel	[44]
8.	Chitosan and Polyacrylamide	-	-	Semi-IPN Hydrogel	[57]
9.	Sodium Alginate + Poly(lactic acid)	Glutaraldehyde	Penicillamine	IPN Hydrogel	[58]
10.	Poly(Ethylene Oxide) + Poly(Methyl Methacrylate)	-	-	IPN hydrogels	[59]
11.	Konjac glucomannan + Polyacrylic acid	N,N-methylene-bis-acrylamide	-	IPN Hydrogels	[60]
12.	Chitosan + Polyvinyl alcohol	Glyoxal	-	IPN Hydrogels	[61]
13.	Gelatin + Polyvinyl alcohol	Transglutaminase enzyme	-	IPN Hydrogels	[52]
14.	Polyacrylamide-co-solfopropylacrylate potassium + Polyacrylonitrile	N,N-methylene-bis-acrylamide	-	IPN Hydrogel	[62]
15.	Polybutyl acrylate + Polyhydroxylethyl acrylate	Ethylene glycol dimethacrylate	Iron Oxide	Hydrogel	[3]