So ever since my little peanut got rsv and had to take Tylenol every 4 hours (she would spit most of…

So ever since my little peanut got rsv and had to take Tylenol every 4 hours (she would spit most of it up) for fever which has been almost a month ago. She will not swallow medicine any medicine since she has gotten sick it's such a chore to give it to her and it used to be so easy she used to like taking her medicine. I hardly get any of her Zantac down her and she needs it!! Is this a common problem? Any tips?