Cyclosporine, the Energetic component in Optimmune Ointment, suppresses the inflammatory reaction and helps increase tear generation. Phenobarbital can also be used for other needs not mentioned right here. It can be bought per tablet. Phenobarbital requires a prescription from your veterinarian and is classified like a program IV controlled compound. https://medshopinc.com/product/pentobarbital-natrium/