Pantaprazole for any gerd related coughing

My mother suffering from 3rd stage ca esophagus currently on 2nd week rest after concurrent radiotherapy and chemotherapy. We have tried TDS doses of ondasetrone, domperidome, metoclopramide but yet we are not able to control her vomiting due to which she is not able to gain weight. Her vomiting is ver characteristic of - a bout of cough followed by gag reflex leading to vomit. Have given BD dose of Pantaprazole for any gerd related coughing. Kindly guide.

My mother suffering from 3rd stage ca esophagus currently on 2nd week rest after concurrent radiotherapy and chemotherapy. We have tried TDS doses of ondasetrone, domperidome, metoclopramide but yet we are not able to control her vomiting due to which she is not able to gain weight. Her vomiting is ver characteristic of - a bout of cough followed by gag reflex leading to vomit. Have given BD dose of Pantaprazole for any gerd related coughing. Kindly guide.

Granisetron if not helping then syrup Phenergan