I am 75 and have been on Zanubrutinib since November 2023 … so nearly a year. I take 4-80mg capsules of Zanubrutinib per day and have experienced minimal side effects. My paraprotein levels, already high, have not increased since being on Zanubrutinib; however, those levels have not decreased any while being on Zanubrutinib. My cancer is stable is perhaps the most appropriate description.