Brain tumor

Good morning. My father discovered that his lung cancer has travelled to the brain.

He was already undergoing treatment for the lung cancer, tablets daily and a drip every 6 weeks. With tests showing that his tumours were shrinking. 

He had to come off the tablets because they were comprising his heart. All his stats - kidney, heart, bloods etc are all showing fine. 

Is there any other treatment available? Chemo - radiotherapy - radiosurgery ? 

Thanks in advance