I was allowed to try Adderall xr, by my psychiatrist. Tried it for a few days, couldn't eat, sleep, and felt the withdrawal within less than 8 hours, was crying and felt insane. Not a good way to get out of depression. I felt a little more happy, but definitely zoned out and spacey. Like I could take on anything and not be depressed. So sudafed may have some stimulant properties, but honestly I think your upping your amitriptyline was not a good idea either. Just my opinion.