I kliniske forsøg var de eneste bivirkninger, som konsekvent ansås for at være forbundet med indgift af filgrastim, muskuloskeletale smerter, hovedsageligt lette til moderate knoglesmerter og myalgi.
In clinical studies, the only undesirable effects that were consistently considered to be related to filgrastim administration were musculoskeletal pain, predominantly mild to moderate bone pain and myalgia.