Help! My sister just drank something terrible!!! Hurry!?

She drank this ancient (a few months, 3 or 4) pomegranate or rasebeey joice! It was moldy and sticky and wasnt even really liquid any more!!!! What should I do!!?!?! She is chugging down milk as fast as she can!?!?!? Any thing we should do!?!?!?!??!!??!!!?!?!? Help!!!!! It as VILE!!!! Hurry!!!! THANKS!