Hi, there is actually a Triamcinolone Acetonide Dental Paste that’s formulated specifically for use in the mouth, so it’s not a toxic medication. It’s a steroid product and generally safe for most people to use. It is a means to reduce inflammation.

There are other topical formulations for this medication such as the one I think you have. The topical cream. The packaging directions are to help prevent the person using it from consuming too large of a steroid dosage. But if this is on your lips and you’re not putting huge amounts on at a time or continually licking it off, you shouldn’t have any issues.

With any steroids, too much can cause a number of side effects and especially yeast infections in the mouth. But your amount is so little and it’s not in the mouth. If your Physician’s Assistant prescribed this, I’m guessing it’s not the first time they’ve done so and made that decision because it is effective.
If you’re having good luck with Chapstick or the Aquaphor and nervous about using the steroid cream then hold off for a while. Or, just apply the Triamcinolone at bedtime.

I had seriously chapped lips for about 2 years after my bone marrow transplant and tried so many balms. I’d used ChapStick most of my adult life but that did nothing for my medically induced dry lips. I found relief with Burts Bees. Not sure what makes the difference in that product but it is very calming and my lips are no longer chapped or peeling. That’s another you might try.
Do you find yourself licking your lips a lot? Is your mouth also dry?
Aloha! ✌️