Zantac and Gerber Soothe Drops = Weird 💩?

Jessica • Wife 💍•Mommy to 👧🏻 and 1 👼🏻• Our 🌈 Girl is Due 07•13•19

My 5 week old started Zantac last night (0.6ml 2x day so she has has 2 doses so far) and we have been giving her Gerber Soothe Probiotics for about 4 days now. She is exclusively breastfed. Today she had a pretty big blowout, it was a little runnier than normal, more “mucus” like, and then a smaller poop that wasn’t runny but was more of a yellow/green color. Could this be a result of one of her medications? She seems to be absolutely fine! TIA!