The original Hulda ClarkLiver Flush said to lay flat on your back with your head high up on the pillows then don't move for 20 minutes. Some practitioners have modified her Liver-Flush and say to lay on the right side, often with the knees bent. Some of the original Liver Flushes that were used back in the Middle Ages and continued in folklore had the person eat a fatty, heavy meal and then walk all night and I think they probably did a purge, too.
I found that after drinking the O/G potion that it stayed in my stomach and wasn't released into the small intestine. I learned to massage gently, stroking down from the sternum to the abdomen to allow the stomach to empty.