Hi @msdoss, Claritin worked like a charm for me too. I’d asked my hem/oncologist why/how it stopped that nasty side effect from the Nulastin.
He said that Neulasta can have an effect on histamine levels in the body. Elevated histamines increase inflammation, which in turn can create swelling in the bone, resulting in pain.
Claritin is an antihistamine that blocks histamine, so decreases the amount of inflammation and swelling.

Whatever the reason, it worked! Let’s hope the Neulasta days are behind us both, right? ☺️