As you know the morning after you will need to be close to a bathroom - several times. I found I had little warning of 'when' I would need to rush to the bathroom! The first flush I did, I felt sooo good after getting out those stones! But, the day after then, I had to do a salt water flush (I use magnesium Citrate mixed with Sugar free ginergale) cause there was more to come out that I felt just 'sitting there' and I did not want anything stuck!
So yes, it is a bit tiring, but more, for me, a matter of needing to be by the throne!
I was doing them 2x a month - and then stopped, I should not have done that!