A few years ago, bugs were just finding me at home, and so I went to the hardware store and purchased some heavy-duty roach poison. It's a white powder; active ingredient: boric acid. I was informed of its toxicity and the need to avoid inhaling it, where it would, you know, damage my mucous membranes.
You said it's a vaginal suppository at a CVS, so you're in the united states at a major retailer looking at a major product category that contains a common ingredient for that category. There isn't any serious ambiguity. Boric acid preparations have mild and mostly gentle antibiotic properties.
> god what was I doing in that aisle?
This plus the university betrays a kind of youthful naivety, so, if it helps any, the boric acid in the suppository was there to raise acidity by a not dangerously high amount when used in moderation.
> you're describing a much different preparation than the one I found
You said boric acid, they said boric acid. Boric acid is commonly used in products meant to reduce bacteria and fungi. It's common in eye drops too.
I've purchased the Similasan products before when I was dealing with dry eye/eye strain issues, and they are bunk. Mostly saline and some homeopathic BS. That said saline "helped" and they usually labeled it as "relief" not a cure or treatment so I knew it wasn't anything more at best than a symptom reliever. That said I never bought them again as they didn't do anything more than plain saline drops.
I was in a CVS a few years ago where they were selling a tincture which was supposed to help children stop wetting the bed. It contained mercury. I’m not sure how they could legally sell that.