Dear Grace,
Herceptin should not affect hair growth. I did not have other drugs that you did but am on Herceptin, have not lost a hair on my head. It grows so fast, have to get it cut every few weeks. I imagine the slow growth is from the other drugs. I have talked with others and they said it took about 6 months or so for their hair to grow back and be quite short. Let me know how you are progressing.
ginkott1@aol.com