Reflux worse when sitting up

[Nataliieexo]

My little boy has had reflux since he was 3 weeks both acid and sick type, the acid part is under control with ranitidine, I started solids early on peadiatritions advice, and have him on reflux milk. Since starting solids I have seen no difference he is still sick but now he has started sitting up for a few minutes on his own for a minute here and there and I help him practice a few times a day but he is always really sick, worse than normal when he is in the sitting position. I was told the reflux would get better when he was sitting up aswell... Is this normal?