Ginger Snaps 2 (2004)

AKA: Ginger Snaps 2: Unleashed
Directed by: Brett Sullivan
Starring: Emily Perkins (Brigitte), Tatiana Maslany (Ghost), Eric Johnson (Tyler), Janet Kidder (Alice), Katharine Isabelle (Ginger)
Country: Canada; Effed Up Canadian Films
Language: English (Optional Eng Subs)
Runtime: 01:34:11
Genres: Werewolves, Siblings, Teenager, Gruesome, Body Modification, SelfHarm

Plot – Spoilers:
Sequel to Ginger Snaps that focuses more on Brigitte battling lycanthropy, with Ginger sparingly used here.

Brigitte ends up in rehab when she’s mistaken for a junkie. She’s aided in her plans to escape from it by a precocious kid obsessed with comicbooks and crafting her own superhero character. There’s also this chad character at the clinic who views the place as his own private harem.