Hi amn17......I was on Amikacin IV for 8 weeks and experienced the same.....thick headed, fuzzy brained, dizzy, and fatigued. I am now at NJH in Denver and my doctor here will be switching me to an amikacin nebulizer. That way the drug goes right to the lungs and not to the brain and other body parts. Maybe this would work for you too? Ask your doctor...hop this helps!