"From what I have read, the effective ingredient in them is probably the belladonna rather than the homeopathic ingredients..."
It sounds like you might have some confusion about what a homeopathic medication actually is and perhaps how it's supposed to work. You might want to Google that... Anywho, the homeopathic meds consist of: a sugar (maybe dextrose, sucrose, or lactose), a binder to hold it together in a tablet form, and a dilution (your "effective" ingredient). I'm not going to go into the philosophy, but basically the more diluted the product the more potent it is supposed to be (makes sense right?), so you will see bottles that say x60 or x400 etc, which is the number of 10 fold dilutions the ingredient has gone under. So, a "high potency" x400 dilution would have 1x10^-400 parts of active ingredient left. Just so you know, the entire observable universe, all the billions (trillions?) of galaxies contain maybe upwards of 1x10^82 atoms total...just let that sink in a minute. The only belladonna that could get into these tablets at that level of dilution is if it randomly waft into the factory from some nightshade plants from outside. This is the FDA's issue, that the product had detectable levels of belladonna when (if hyland was following their dilution protocol) shouldn't have had any at all..