Super nasty magnesium citrate & when is it enough? TMI

Surgery 8am & I am still trying to gag my way through a bottle of grape flavored Citroma.  I figured grape was better than lemon.  Perhaps I was wrong.  I have only had about 40% of the bottle.  I no longer have a gallbladder so I'm not sure if yellow liquid is ok or if I should finish off the bottle. ick

I only drank 1 1/2 bottles of the lemon citrate. It was so bad.