As I mention in my blog, taking a one quart coffee retention enema can cause a buzz or anxiety. Reducing the quantity to two cups and laying on your left side should prevent the buzz. I find it preferable to take 2 two cup (1 pint) enemas back to back to a one quart enema. You should retain each enema for 10-15 minutes.
Doing it daily for several months did a nice job of cleansing my liver and actually my whole body. More time consuming than a liver flush but much less traumatic.