I had lumpectomy, 6 cycles of chemo & 37 shots of radiation
I have treated many patients after cancer treatments. It is always reassuring when i speak directly with your oncologist so we are all aware of the your current condition. But you should be fine with Botox treatments while on Tamoxifen.
There is no clinical evidence of any considerable interaction between estrogen blockers such as tamoxifen and medical botulinum toxins. Plus the dose required to address your concerns with your forehead is small. So go ahead and enjoy the results!! Dr. Daniyar