“Early removal of lower arc brace?”

 
I just got my braces, and I have upper and lower arc braces. I'd like to change the treatment where i only have upper arc brace, is it still possible?
 
Yes, anything's possible, but not likely a good idea.  When braces are put on top and bottom, they are designed to move all the teeth to an ideal condition so that they work together.  Just moving one arch will likely compromise the final result.
 
Will the package fee be changed?  Can I give my brackets to my sibling? Who is under treatment also?
 
Changing the fee would be up to the treating doctor.  You already have them attached, so removing them will likely have a cost associated.  And no, they cannot/should not be used by someone else.  First of all, they will likely be damaged during removal.  Second, just because your sibling is having treatment, that doesn't mean that the exact conditions exist to use your brackets or wires.  And third, I'm pretty sure that recycling materials that way would be considered unethical.
 
But why are you even considering this?  You should really speak to your treating doctor.
 
Michael A. Conrad, DDS, PC
 

Brackets can NOT be given to another person. Treating only one arch will not end up with top and bottom teeth that are aligned. You might NOT be able to chew! Speak to your orthodontist.