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. 2016 May 31;82(2):340–351. doi: 10.1111/bcp.12961

Table 1.

An example of an ISR grading system to score the severity used for PF3512676 11

Grade 1 mild (does not interfere with daily life)
Grade 2 moderate (interferes with daily life but no dose modification)
Grade 3 severe (requires dose modification)
Grade 4 disabling (requires drug discontinuation)