True Romance Inspiration? (Spoilers)
Couple get their hands on a bunch of valuable drugs accidentally. (Following a violent fight with hard-core criminals.) They have to take off on the lam. Someone closely connected to them gets tortured in an effort to find them. They end up in L.A. where they look up a friend in the film industry to sell the drug to Hollywood types. Their plan is to escape to Mexico, and live there, and there is a pursuit, and major shootouts along the way.
Big difference - in this one, the idealistic, *beep* lead guy doesn't make it. (Neither did Christian Slater in the original version of True Romance.)
There is also some Pulp Fiction inspiration, in terms of the heroin OD scene, and other parts I'm forgetting right now.