Karen,
Welcome here.
If your question about fluid removal involves draining a pleural effusion, then yes I’ve experienced it. I had a local anesthetic and a long needle was used to withdraw the fluid from the pleural space. My discomfort breathing was immediately relieved. I admit, I was concerned when I saw the rather large needle, but I didn’t feel a thing. Does the fluid come back? Sometimes. The fluid results because the lungs are experiencing irritation. Judy reports her Tagrisso stopped the fluid and mine never returned when I started chemo. I do hope you have but one drain session and results improve with Tagrisso.
Stay the course.
Tom
I haven't had the procedure but Tagrisso should help after the fluid has been drained. Plenty of people report that Tagrisso dried up their fluid completely. Two weeks is a short time, so give it time to work. For me, chemo and radiation resolved the fluid in my left lung. Best of luck with the procedure.