I only remember a scene from this movie:
A drug addict is locked up by his mother in a house to stop him from getting drugs. Seeing how much he suffers going through withdrawal the mother decides to give him a fix. She actually prepares the drugs in a spoon (using a lighter maybe). I remember they didn't have a syringe and had to improvise something. It was a pretty intense scene.
The movie probably appeared in the 90s or early 2000s and I don't think it was an american movie. I think they spoke spanish or french, but I may be wrong.