Disclosed herein are compositions, methods and uses utilizing alginate compositions, for treating, preventing and/or reducing liver damage induced by a hepatotoxic agent, and for treating a medical condition treatable by a hepatotoxic agent, in which an alginate composition is administered prior to, concomitant with, or shortly after exposure to a hepatotoxic agent. Also disclosed are pharmaceutical compositions comprising a hepatotoxic agent and an alginate composition and uses thereof for treating medical conditions treatable by the hepatotoxic agent.