Thanks for the query.
In patients with VUR it is important to treat the infections appropriately to prevent damage to the kidneys in long term.
There is no antibiotic which is 100% safe. Thus amikacin
also has its share of side effects which includes possible damage to the ears or the kidneys with long term use. These are not different in a child or an adult.
So your paediatrician is the best person to discuss the pros and cons and monitor for recovery as well as side effects.
Hope this helps.