Multiple Italic Functions - Confusing? Or Is There a Better...

Fiction. I have a character who has an internal monologue going. So that's all in italics.

But there's also shit going down around him - explosions and such. So I was shorthanding with sound effects (like an old Batman episode...). And, you know, I was putting those in italics, too.

I would presume no one would find that confusing. They would recognize *C'mon, kitty, now is not the time to assert yourself* is the character's inner voice and *Kerr-BANG* is the outer chaos, but...

Is there a better way? Besides eliminating the sounds altogether? I'm going for a pulpy feel, so they're not out of place.