What's the most efficient way to find crystal structures of drugs?
I think my first question is why you need the crystal structure?

For organic molecules, the definitive resource is the proprietary (and fairly expensive) Cambridge Structure Database.

The Crystallographic Open Database which you linked is fairly new and expanding, but does not have the many, many molecular crystals in the CSD. For example, American Chemical Society journals required submission to the CSD for publication.

My suggestion would be to start with the NIH Chemical Resolver or PubChem. The latter has a 3D computed structure of (R)-fluoxetine, which I'm sure is pretty decent. Jmol should be able to load these directly, or you could save SDF files and open them in Jmol.

I'll point out that Avogadro can also do these tasks, but since I'm the creator, I'm biased.