I've never been told a specific med was hard on the teeth but the extreme dry mouth was. I've been on high doses of lots of meds over the years (I've had trouble getting meds that worked so I've been on high to extremely doses of more than an average number of meds over the last 14 years, often a bunch of meds that all added to the dry mouth) and my dentist says I probably didn't have very strong teeth to begin with as a genetic thing, plus I had unflouridated water growing up.

I drink a ton of water and some milk and very little sugary drinks. Aside from my recent bad episode I've had good oral care and even then they said I'm getting my teeth clean enough.

I do grind my teeth badly and that hasn't helped things but I haven't had any new big issues from that in a few years. I don't know if the grinding weakens the enamal at all.

Eventually I'm going to have nothing but fillings.