It's why I think Howard placed the drugs into ANS drink cup. We have reason to think this after hearing Birkhead testify that he spiked her IV at the hospital in California, ergo Daniel accidentally drank from the wrong cup, ingested a lethal dose because his body wasn't used to all those drugs and he died. It would also explain why she was so bereft, would have blamed herself for the death because if she had not been or allowed HKS to be so reckless Daniel would still be alive.
That makes a lot of sense.
I don't have cable, so I don't catch lots of detail. But you are the second person on the thread I have read mention this. What I would like to have clarified is how could Birkhead have possibly known Howard spiked her IV in the hospital? Was he actually there and seen it done? Was the IV tested and they found the drugs in it?