I finally found a full description of how Welcol (including Questran and that other one) works. It binds up all of your bile (thus why it's good for us with too much floating around loose!), and keeps your body from reabsorbing it and reusing it. This makes your liver draw bad cholesterol out of your blood stream in order to make new bile. Apparently this isn't as effective for lowering your cholesterol as other medicines, but the only real side effect is constipation, and it doesn't interact with other medicines (only interferes with the absorption of some), so for some people it's better than nothing if their other medicine dictates they can't have typical cholesterol medicine.
I wonder, then, if Welchol (etc.) would help keep people from getting stones by causing such a derth of cholesterol that there's not enough of it to harden into stones?
Hey, Sarita, there's you a clinical study to do for one of your final tests/thesis!