Allergic to opti?
you most definitely can be allergic! Call the clinic, I was put on an alternative pre op diet that consisted of 900 cals, and very high protein. I basically ate the same numbers as opti. i would call telehealth and just stop taking the opti until you reach them in the morning. not a dr, but thats just what I would do :) is your throat itchy? feel funny to swallow?