Zantac = Dark poo???

GingerWife · February 2012

Anyone who put their LO on zantac have it change the color of their poo?

I bf so usually it is "seedy mustard yellow". We started Zantac two days ago. This morning DH reported that one of the diapers was greenish brown and one I changed was yellowish brown. Same consistency as other diapers, just a different color.

I also have mastitis for which I started an antibiotic last night...so that could be it as well.

Anyone have any insight? Is it something to worry about?

PMFuentes10 · February 2012

We started DS on Zantac a couple weeks ago and his BMs changed to a darker hue as well. Our Pedi said this is a common side effect and nothing to worry about.