This last session of chemo has knocked me for six a bit. Until then I would feel a little dizzy if I climbed the stairs a bit too quickly. But at the moment even getting up from a chair makes my head spin as if I am about to faint.
According to "Living with a Brain Tumour" chemotherapy affects the bone marrow causing low counts of red cells in the blood. From school biology lessons I seem to recall that those are the cells that carry oxygen round the body. So I think the dizziness is due to the brain not receiving as much oxygen as it would like. In other words it is to be expected and I will just have to take it easier for a while.
It would be nice to know how long it takes the blood to recover once the chemotherapy is over, though, and whether there is anything I can do to speed the recovery process up a bit.