Possibly. Neulasta works by triggering your immune system to make more white blood cells.
Certain proteins called histamines are also released by this process. It’s not exactly known why the release of histamines leads to side effects such as bone pain. But research has shown that histamine is involved in inflammation, which can cause pain.
Claritin is an antihistamine medication. It works by blocking the action of histamine. By doing so, Claritin may help reduce bone pain in people taking Neulasta, but more research is needed.
If you’re taking Neulasta and having bone pain, talk with your doctor. They can review available treatments and help determine which one is best for you.