well OP's gone.
>Drinking hydrogen peroxide can cause chemical burns in the esophagus, which can lead to scarring and even narrow it, making it more likely you’ll choke. According to the American Cancer Society, drinking the 35% solution can cause severe burns to the throat and stomach, vomiting and even death.
this next blurb is related to injecting it, which some people thought was a good idea at some point in history I guess
>High blood levels of hydrogen peroxide in the bloodstream can cause oxygen bubbles that then block the flow of blood, which can lead to gangrene and death.