Does Visine™ React with Lead?

Question

I was watching an episode of CSI and it was about a man who gambled, and at every tournament he ate about a pound of chocolate.

And he mysteriously died one night after arguing with a waitress.

So it turns out that the waitress put Visine in his drink to give him diarrhea, but instead, since the cocoa used to make the chocolate was from Africa, and the acid rain in Africa is full of lead, which got into the cocoa plants, leaving small traces of lead in the chocolate, which filled the man with lead deposits, reacted with the high level of lead in his body, killing him instantly.

How did this happen? Like what reacted with what, that wouldve caused the man to fall over dead? They never said, and it has been bothering me.

Answer 1

Visine Eye Drops contain tetrahydrozoline hydrochloride 7,5 mg/15 mL; sodium chloride; boric acid; sodium borate; with benzalkonium chloride 0,01% and disodium ethylenediamine tetra-acetate 0,1% added as preservatives.

The tetrahydrozoline is a strong chelating agent for metals.