My babies have always been difficult with meds (spec zantac) but i found a few things over the many nights trying to give them that helped
they need to be right back , almost flat (difficult with a refluxer i know but try your best ) with there head still in your hand so the swollow reflux is triggered.
Needs to go in the cheek to side down .
Make sure the dropper is washed in boiled water, my bubs all hated the miltons taste.
You can ask the chemist to flavour it (some will, some wil not)
If your bub like a dummy those dummys that give the meds are great.
Good luck