Oor Ennai (for babies digestion)

Hi all, recently had a son and he has a bit of acid reflux and lot of gassiness. We have tried the English medicines ( ie gas drops, gripe water etc). My FİL mentioned a siddha/naatu medicine called “Oor Ennai”. Apparently he got it for my wife when she was a baby in Anna Nagar about 30 yrs back. Wondering if anyone here might have some idea about it or would have heard about it. TIA