When not to stop conventional medical treatment

I am always hearing how patients undergoing conventional medical treatments dump all that advice to go with a more homeopathic treatment. These homeopathic treatments (which I am a fan of and have used) are generally a very natural and effective way to get certain ailments under control (not really severe medical conditions, however).

When it comes to severe medical conditions, though, this patient had grave results making a switch from the standard medical community's advice to a more homeopathic path -- and death was the unfortunate result.

Although this case involved a hearth complication as opposed to seasonal allergies (for example), there are some cases when conventional drugs used for treatment are possibly going to be the only way to treat a patient. If you've tried homeopathic treatments for certain illnesses or conditions, what was your result?