Tamarind is a fruit that is popular in the foods of Southeast Asia, North Africa and India.
I have discovered a simple tea that brings tremendous relief to gallstone pain and is an all-around healthy drink to boot. Flaxseed Tea. All you have to do is get your hands on a bag of golden flax seeds from the healthfood store. I found adding a stick of cinnamon while it steeps adds a nice flavor.
Drink 8 cups of fluids (preferably water) a day. After 2-3 days, increase to 1 teaspoon of ground flax a day. Continue this to the goal of 2 teaspoons ground flaxseed daily. (~greater than 6y/o or 50-100 pounds; if greater than 100lbs work up to adult dose). Start with 1 teaspoon of ground flax seed a day.