In most cases, finding a 'quick fix' is not a good idea in this hobby.
You need to research proper acclimatization techniques.
Some hints:
. keep the room dim/dark while opening the package the fish came in
. keep the tank lights off for the first day or two
. use a 'drip' line to slowly add tank water to the shipment
Follow some basic guidelines like that and you will be fine, no chemicals needed.