NEW Meds are Working!! The New “after-shot” medication, Neupogen (Filgrastim) is doing its job but isn’t causing my body the debilitating joint pain I was experiencing from the Fulphila. This is great news. it would be wrong for anyone to give medical advice to someone going through this, so all I’m gonna to say is -talk to your oncologist and/or your care team. Let them know f you’re experiencing negative reactions to your treatment, have them do a deep dive into other alternative treatment met