Chemotherapy can cause a number of side effects that can afffect your balance and movement and lead you to fall down more frequently. One of the most common side effects
of many chemo drugs is central and peripheral neuropathy (injury to the nerves from chemotherapy that interferes with their normal function). Normal function includes sensation that allows people to walk, muscles to move, and adjustments to be made for changes in physical environment (such as raising a leg to go up stairs). The numbness and lack of feeling resulting from neuropathy affect stability and movement.
Another side effect of chemo, loss of red blood cells, can lead to anemia which causes weakness and dizziness, even to the point of falling down. A low red blood cell count can also cause breathlessness; this could be a reason that you feel like you're "passing
The nausea and loss of appetite that often come with chemo can also cause weakness and dizziness. You may want to evaluate if you're getting enough nutrition. If you can't tolerate food, you could try Ensure®, Boost®, or other nutritional supplements.Try to stay hydrated as well.
Just as you do with pain, track when the falling down happens. Are you falling or dizzy when you're sitting, standing, or getting up? How often does this happen? Does it occur before or after a meal? Is there any noticeable pattern? Write the answers to these questions before calling your medical practitioner. He or she may want to see you for further evaluation, including an exam, blood work, and other tests. If the oncologist finds that blood counts are low, she can prescribe blood transfusions to boost the levels of healthy cells.
Remember that dizziness and falling down can be symptoms of many things, including other potentially severe medical illnesses, particularly cardiovascular disease and stroke, so don't let falling down go without evaluation.