ซื้อchloramphenicol 500mg/100ml eye drops,solution,5ml, chloramphenicol 1g/100g eye ointment,5g, gramicidin 25mcg/ml + neomycin sulfate 2mg/ml + polymyxin B sulfate 5000iu/ml eye drops,solution,5ml, dexamethasone 100mg/100ml + neomycin sulfate 500mg/100ml ear/eye drops,solution,4ml โดยวิธีเฉพาะเจาะจง