How about e-cigarettes?
I have been using an e-cig to quit smoking after 40 years.
It’s going well and have stepped down the nicotine levels from 18mg/ml to 6mg/ml. It’s been about 6 weeks, and once I get to zero, the intent is to stop the vap-thing.
Cross each bridge as I get to it.
Should be the same as they are nothing but drug delivery devices.