Use of frankincense and tramadol to control pain from oral melanoma (canine)

My dog was recently diagnosed with Stage 4 oral melanoma. She is currently taking tramadol to control pain, and frankincense is being used to help fight the cancer, but I have seen literature contraindicating the use of both concurrently in humans. Do you have any insight regarding the use of both in dogs? We are currently without many treatment options given her stage, and are focusing on management and keeping her as comfortable and healthy for as long as possible.