MY SISTER WAS RECENTLY DX WITH METASTATIC CA...LUNGS,LIVER AND BONE.

MY SISTER WAS RECENTLY DX WITH METASTATIC CA...LUNGS,LIVER AND BONE. HX OF BREAST CANCER ALSO. SO SHE HAS BEEN VOMITING FOR LAST 2 MONTHS. SHE WAS TOLD BY HER PCP TO TAKE ZOFRAN AND IF THIS DOSNT WORK IN AN HOUR THEN TAKE COMPAZINE SUPP AND IF THIS DOSNT WORK IN AN HOUR THEN TAKE PHENERGAN AND IF THIS DOSNT WORK IN AN HOUR THEN TAKE....ANYWAYS SHE WAS GIVEN A TOTAL OF 5 ANTIEMETICS TOTAL. DOESN'T THIS SOUND CONTRAINDICATED TO BE TAKING SO MUCH MEDS ESP WITH LIVER CANCER?