Specific measures should be taken by your veterinarian in case of the following reactions (see section 15): • Severe renal toxicity may occur in dogs suffering from renal disorders at the start of treatment (including high blood creatinine level or proteinuria). • Moderate to severe anaemia (aplastic/ haemolytic) with a mean duration of approximately 7 days. • Protein-loss syndrome (mainly due to a decrease in serum albumin). • Mild or moderate neutropenia with a mean duration of approximately 24 days. • Increase in aminotransferase (ALT or AST) with a mean duration of approximately 29 days.