1 General Chemotherapy 2 Sulphonamides 3 Beta lactam antibiotics 4.Cephalosporins 5 Tetracyclines 6 Aminoglycosides 7 Chloramphenicol 8 Fluoroquinolones 9 Polypeptides 10 macrolides 11 Anthelmintics 12 Antifungal agents  13 Antineoplastic agents 14 Antiviral agents 15 Ectoparasiticides