I have history of Multiple Myeloma when I get up from sitting I take one step get off balance?

Hi, I’m (…) 57 yr. old. History multiple myeloma, have defibrilator, low blood pressure. Meds: omeprazole, baby aspirin, Coumadin, amiodarone,fleccanide, lisinopril, neurontin, Ativan, metropolol. What has me concerned is blurry vision, which is a side effect of fleccanide, but it’s mainly left eye. Also when I get up from sitting I take one step, get off balance, weak and walk like a drunk person. Have not fallen but come close, walk Into chairs. This is occasionally.