Nilotinib, also known as AMN107, is a tyrosine kinase inhibitor under investigation as a possible treatment for chronic myelogenous leukemia (CML). In June 2006, a Phase I clinical trial found nilotinib has a relatively favorable safety profile and shows activity in cases of CML resistant to treatment with imatinib (Gleevec®), another tyrosine kinase inhibitor currently used as a first-line treatment. [Wikipedia]
The T-value in the score for hazard refers to chronic toxicity. Underlying data for P, B and risk are from assessment report. T comes from Fass. Below is Hazard and Risk according to data from the assessment report for Tasigna (nilotinib) from 20 December 2010 EMA/CHMP/678167/2010 and from 21 April 2017 EMA/313746/2017 Hazard Persistence: "Nilotinib showed a half-life of 179-213 days for the total water-sediment systems (normalized to 12°C) and a half-life of 369 days for soils (normalized to 12°C). Consequently the criteria for a very persistent (vP) substance of 180 days in water-sediment systems and soils defined in the REACH guidance on PBT assessment is exceeded for both compartments." Bioaccumulation: "Bioconcentration factor of 127. This assessment revealed that nilotinib cannot be considered as a PBT substance based on its low bioconcentration potential in fish." Toxicity: There are data for 3 trophic levels, most sensitive crustacean (Daphnia magna) NOEC-21 days = 12.7 microg/L. "However algae toxicity and fish chronic toxicity need to be further characterised." No such data are available at the present time, in consultation with the Swedish Medical Products Agency 2018-09-04. "The active ingredient is not considered as PBT substance. However, the active ingredient and its transformation products are very persistent in soil and sediment." Risk The risk, PEC/PNEC, calculated from data in the assessment report from a European perspective: PEC = 4 microg/L (worst case, there are also data 0,036 och 0,009 "[prevalence and proposal for market data, used in Phase II]") (EMA/313746/2017). PNEC = NOEC 12.7 microg/L/100 (Assessment Factor (AF) for 1 chronic study) = 0.127 microg/L. PEC/PNEC = 31.496 which gives the risk high. According to EMA/CHMP/678167/2010: "Based on data on Daphnia magna, effects on microorganism, sub-chronic effects on fish early life stage, at the predicted environmental concentration (PEC) and calculation of PEC/PNEC ratios, it can be concluded that nilotinib HCl would not represent a relevant risk to surface water and groundwater microorganisms (sewage treatment plant)." Below is Hazard and Risk from Fass environmental information for Tasigna (downloaded 2018-09-05) Hazard Persistence: "DT50 (total system) = 84.0–100.0 days. Based on the DT50 for the total system, the phrase 'Nilotinb is slowly degraded in the environment' is chosen."" Bioaccumulation: BCFss = 65–75. Toxicity: There is data for 3 trophic levels, lowest for fish (zebra fish) NOEC 7 days = 2.6 microg/L. Risk PEC/PNEC is based on sales data in Sweden in year 2016. PEC = 0.0069 microg/L. PNEC = 0.26 microg/L. PEC/PNEC = 0.027 which gives the risk insignificant.
European Medicines Agency. European public assessment reports (EPAR).