Mom starting chemo

So happy to have found this board. Mom had lumpectomy 1 yr ago,no nodes,txed with rads and Arimidex. 3 weeks ago blood tests showed tumor markers high as well as liver enzymes.After MRI and body scans,Dr. saw tiny tumors in her liver,did a PET scan to confirm. They are malignant,and even though there are no lesions,there was activity in the bones. She is 78 and otherwise in good health. She will be starting a weekly dose of herceptin/carbo/taxol.I have read that the side effects aren't so bad. What can she expect other than hair loss? Anyone else on this regime? Thank you in advance.