Like the intravenous injection, ...

An intravenous injection in the carotid artery.

He was poisoned by intravenously- injected substances.

Were you trained in intravenous injection? Yes.

He was poisoned by intravenously-injected substances.

I'll proceed directly to the intravenous injection of hard drugs.

I'll proceed directly to the intravenous injection of hard drugs.

I'll proceed directly to the intravenous injection of hard drugs, please.

It's an intravenous injection, and he wasn't receiving that kind of treatment.

Then how did he die? He was poisoned by intravenously- injected substances.