My father was diagnsoed with small cell lung cancer - extensive in January this year. He completed 4 rounds of chemo and was then advised to have preventative radiotherapy to the brain.
It has been 2 months since the radiotherapy to the brain and he is constantly dizzy and unsteady on his feet. Is this something that will continue or will subside with time? If it is to subside- how much longer will he endure dizziness and unsteadiness?
Thank you for your advice in advance.