Could it be the Verzenio causing the hair loss or could be the combination of both. I am 54 was on Tamoxifen 7.5 years, hit menopause and was switched to Anastrazole which I have been on for 1.5 years. Hair is thinning a lot but no bald spots or baldness yet. I have one more year to go on the Anastrazole but I was just diagnosed with a reoccurrence or a new cancer that is in my liver, abdomen, chest, rib, spine, sternum, fore arms and a tumor in my clavicle although I took the Tamoxifen and Anastrazole as directed to complete 10 years. I have a biopsy this week on 1/6/2022. My breast cancer was ER+ PR+ HER2+ aggressive, I had chemo, trial drug, double mastectomy and 35 radiation treatments in 2012 followed by Herceptin.