Duralactin Feline L-Lysine, 32.5 mL is a nutritional supplement for cats that combines the anti-inflammatory power of MicroLactin with l-lysine. The l-lysine in this product has been shown to help stop the reproduction of the feline herpes virus and helps treat the virus' associated ocular and respiratory symptoms. Active ingredients: Lysine (250mg per 2.5ml) and MicroLactin (200mg per 2.5ml).  MicroLactin contains factors that modify the neutrophil/endothelial cell interaction to reduce emigration of neutrophils, resulting in reduced inflammatation. 32.5 ml dial-a-dose syringe