An antimicrobial amphiphilic hydrogel composition for use in haemostasis of a wound comprising: a first cross-linkable amphiphilic component, the first amphiphilic component, in its chemically cross-linked state, being a lyotropic liquid crystal and having an ordered nanostructure of hydrophobic and hydrophilic domains, the hydrogel comprising an antimicrobial agent covalently attached to the hydrophilic and/or hydrophobic domains.

An antimicrobial amphiphilic hydrogel composition for use in haemostasis of a wound comprising: a first cross-linkable amphiphilic component, the first amphiphilic component, in its chemically cross-linked state, being a lyotropic liquid crystal and having an ordered nanostructure of hydrophobic and hydrophilic domains, the hydrogel comprising an antimicrobial agent covalently attached to the hydrophilic and/or hydrophobic domains.