Chlorhexidine 4% With Antibiofilm ComplexHenry Schein SilVet C4% Antiseptic Shampoo contains maximum strength chlorhexidine in a deep cleansing and deodorizing soap-free shampoo. In addition to chlorhexidine 4% for antibacterial activity, MicroSilver BG is included for enhanced antiseptic and antibiofilm activity.