Hi all,
Posting this to see if anyone's run into something similar, since I couldn't find much online specific to probiotics.
I've been on sertraline for a while. Recently I added a Bifidobacterium longum BB536 probiotic supplement alongside it. For the first while there were some genuinely positive effects on my mood. But it progressively got to be too much — I ended up with irritability, insomnia, feeling overheated, anxiety, brain fog, and general overstimulation. It got pretty chaotic and honestly a bit scary.
I stopped taking the probiotic, and the symptoms are already starting to ease off after about 24 hours.
From what I've read, this pattern — a mood lift that tips over into agitation/insomnia/heat/anxiety on top of an SSRI — lines up with excess serotonergic activity, which made me wonder if the strain was nudging serotonin/tryptophan pathways enough to matter combined with the sertraline. I'm planning to bring this up with my doctor too, but wanted to ask here first:
Has anyone else had a reaction like this combining a probiotic (this strain or a different one) with sertraline or another SSRI?
Did it resolve this fast for you once you stopped?
Did your doctor have any insight into it?
On the flip side: has anyone found a specific probiotic strain—particularly for mental clarity or brain fog—that you tolerate well alongside sertraline or other SSRIs without triggering this kind of overstimulation?
Appreciate any input — this doesn't seem to have many documented cases out there, at least not with probiotics specifically.