Technically, as one of the ghosts is a man who seems to be coming home from work on the tube when he's killed. During the theater scene he mentions that David made his wife a widow and his children fatherless. They're likely grieving his loss, which would be influenced by the fact he never arrived home safely during what's presumably part of his daily routine. It's obviously not deliberate abandonment, but may be triggering in a similar vein.
Not in the typical sense but if you think about it - David is attacked by a werewolf and therefore ends up becoming one and in his werewolf form, he does attack and kill people.
In a dream, David stalks, attacks and eats a deer. We see it's meat being eaten. When the werewolves are killed, they turn back into their human forms, so therefore we don't see the actual wolf harmed
There's no actual pedophilia, but there is a scene that might potentially be triggering. After David's first transformation he wakes up naked inside a wolf enclosure at the zoo. He hides in the bushes and tricks a local child into giving him his balloons so that he can cover his privates (as the child puts it 'a naked American man stole my balloons'). It's very obviously not sexually predatory in any sense, as David does not expose himself to the kid or have any sexual intentions, and contextually it's a comedic scene, but it may still be upsetting to some viewers.
During the werewolf transformation scene, David's hands grow and contort in an inhumane way. In a brief shot, we see Jack's thumb is disconnected from his hand in his ghost form
In a dream sequence, David has his throat cut with a knife. Jack's ghost has his entire throat exposed as I presume it was ripped out by the werewolf. It's very obviously practical effects but it does look pretty damn good
Not in the typical sense, but during the transformation scene there is a shot of David's feet elongating, focusing on the Achilles Tendon. It's the toughest part of the transformation to watch imo
Not torture so to speak, but the first transformation sequence does involve a lot of screaming and someone being in extreme pain, which is possibly worth mentioning in this category.
In the last quarter or so of the movie, there are some people and their dogs sitting around a fire pit. The holes in the sides of the firepit bin are triggering. Is only there for a scene or two.
David attempts to slit his wrists in a phone booth, but is too afraid to go through and chickens out. In the cinema after that scene, David and the ghosts discuss ways he could kill himself that would be less painful. None of the solutions go through and it's all hypothetical
David’s lycanthropy is assumed to be psychosis for the earlier half of the movie which makes it harder to tell if his word is real or that of the other characters
Not explicitly, but David repeatedly declines eating food because he isn’t hungry due to the transformation, which might be triggering for viewers with an eating disorder
Technically speaking, no character in the film dies via suicide. There is a lot of suicide talk, however, as the protagonist is constantly told to kill himself and is even given methods of doing so. There is also a suicide attempt scene, where he tries to cut his wrist inside a phone booth but fails to go through with it.
David very obviously has PTSD after the attack on the Moors and when Jack first visits him afterwards, he thinks he's dreaming and says "I can't take this." And eventually ends up crying and calling the nurses for help
David yells offensive things including swear words such as "F*CK, sh*t, c*unt" in the middle of London to try and get himself arrested. Swear words are used throughout the film but in general conversation as they would normally with adults
There's a dream sequence where David's family is attacked by werewolf demon Nazis in such a way that's clearly intended to invoke Holocaust imagery. One piece of official merch refers to them as 'nightmare demons,' and Jack mentions that the forces of darkness are real, which raises the possibility that these are actual demons. Other than that, the supernatural horror comes from ghosts and werewolves, not demons.
Three of the ghosts are shown huddling around a fire in a trash can when they are killed. This implies that they were homeless, which makes them easy prey for the werewolf rampaging that night.
There is lots of blood and some pretty knarly body horror. The worst of it, imo, which is the main transformation sequence, happens from 00:59:20 to 01:01:15. Lots of hair, disfigured limbs, audio gore, you name it.