Aqua Sterilisata Braun is sterile water used to mix with other medicines given into a vein.
Your doctor or nurse will decide how much to use based on the medicine it's mixed with.
A doctor or nurse will prepare and give this medicine to you. It will always be mixed with another medicine right before you get it.
It's very unlikely to get too much of this medicine because it's only used to mix with other medicines given into a vein.