What happens if you swallow hydrogen peroxide?

Answer 1

I'm guessing it is harmless if you swollow since it is simply just adding one oxygen atom to the H2O molecule. BUT DO NOT TRY IT I'M NOT COMPLETELY SURE!!!!! If you swollow it on purpose you will soon after see a brick fly at you.

Actually the hydrogen peroxide is effective at killing microorganisms and cells and so it could harm you if you swallowed a lot.

you instantly die if you swallow over 20 litres. believe me, i have tried this, i am dead. so dont try at home :)

Actually, Hydrogen Peroxide can be harmful if swallowed in large quantities, or if a small dosage with a high concentration is ingested. While technically it is just 'one oxygen to the H2O molecule', that is not all that it really is. H2O2 has chemical differences with water, including it's pH level and that it is a strong oxidizer. If you accidentally ingest some H2O2, check the concentration of it. Less than 5% will probably just give you a stomach ache and you should drink water to flush it out of your system. If the concentration is higher than that, immediately go see a doctor or call poison control. Good thing is, most pharmaceutical H2O2 will have a concentration less than 5% for safety reasons, and higher concentrations usually have to be bought at a chemical store or found in a chemistry lab or some such place. But just in case? Don't swallow it.

Answer 2

If a large amount was swalled you could get Hydrogen Peroxide Poisioning and should call poison control or 911. Some of the symptoms are abdominal pain, vommiting, temporary white color to the skin, stomach swelling and burns in teh mouth and throat.