So make sure it's safe, take your casualty from the cause, you may have to resuscitate, now if a person swallows something by mouth, there's two types of poisons, one can go by mouth and one is er corrosive and the other is non-corrosive, but at the same time you have a liquid or tablets, now if it's a corrosive liquid that you have swallowed or somebody has swallowed, it's burning as it's going down, and may I say in first aid you never ever on any circumstances make anybody sick  er especially poisons, can you imagine if it's burnt going down it's probably perforated the food pipe and somebody comes along and overdoses on the water, because you can give sips of water for corrosive, well it's because you're trying to keep the airway open, if it's burning, corrosive is burning you'll get swelling, so this is why you give sips of water, but if you give too much your casualty will be sick and if it's burnt going down and perforated the tubes and they're bringing it up again it's gonna burn coming up and go into those perforations that and cause further damage.