You morons above who blew this guy off are so friggin out of line. He's worried about his wife's health, and probably with good cause.
No one should be using ephedrine for 18 months straight. Nor for 18 weeks straight. She needs to cycle off now. It's that simple. In the future if she needs to lower bodyfat for some reason and has exhausted other options (tightening up her nutrition, adding cardio, increasing cardio, adding intervals, tweaking nutrition, etc.,) then maybe she could revisit it, although if she's not handling it well now I don't see the point. You don't need an ECA stack to get lean.
At most, people who tolerate it well should use this shit for 8-12 weeks before taking a break.