I assumed everyone got this song...

"Travelling swallowing Dramamine"

>Dramamine is diphenhydrinate, an anti-cholingergic over the counter drug used to treat motion sickness in normal doses.

"Feeling spaced breathing out listerine
I’d said what I’d said that I’d tell ya
And that you’d killed the better part of me
If you could just milk it for everything
I’ve said what I’d said and you know what I mean
But I still can’t focus on anything"

>In larger doses, anti-cholinergics induce delirium and highly realistic hallucinations. Hence, feeling spaced out and, the sinker, being unable to focus on anything.

"Traveling swallowing Dramamine
Look at your face like you’re killed in a dream"

>Beyond this point, you pretty much have to have tripped on a deliriant to understand where he's coming from.