I am not going to say this is true or not true. I would like to interject a little open minded medical skepticism for thought.
Fact - Blood is highly nauseating when ingested. Oh, you may be able to "developed a taste" by mind over matter as it flow past your taste buds, But not once it hits the stomach. Ask anyone who has ever had a gastric bleed or taken care of someone with a gastric bleed - what is the first thing they do - nausea followed by vomiting. So do these people take big doses or anti-emetics ( anti nausea medicine) before drinking this blood?
Second - what does the hydrochloric acid in the stomach do to the adrenochrome molecule? Does it break it down, denature it? Any studies?
I am more likely to believe stories of pharmaceutical adrenochrome that is injected into a vein before I would believe someone getting high off of ingested blood, that is if they could keep it down long enough for any to be absorbed.
Again, not saying I believe or don't believe, just a few facts to think about.