vtpaindoc:I use the inbuild windows print driver as you describe. Rather clunky. I thought an app like SF might improve on this and fax directly from Synapse.
Snappy Fax integrates with Synapse via custom file naming .pdfs and Watched Folders.
Essentially you save the .pdf and the name has the fax number and other details in it. If you put it in a watched folder, Snappy Fax will send it. Your patient must have the pharmacy information up to date.
I haven't been doing it lately but I hope to get it going again in the coming weeks.