Brief mention of molestation.

Nothing unusual for an R rating, but there is blood in some scenes where people are killed.

4 uses of fuck (including motherfucker).

1 use of cocksucker.

Other milder language. The main character is notably mild-mannered though and only swears once.

Characters drink.

The subject matter is tragic and disturbing and some scenes where the main character goes crazy could creep people out.