I just noticed we now have a drugs tag and it's been added to quite a few questions.
In the past we used to add such things as synonyms to the health tag. In particular we have [medicine] which is a synonym of [health]. We also have a history of subdividing topics as we grow to cover more specific tags.
However there's a problem with [drugs] in that it has two divergent meanings, both of which are relevant to travel.
One is prescription drugs, i.e. medicine.
The other is illegal drugs.
Then of course there's the blurry area in the middle for medicines which require a prescription or might be totally banned in some countries. Notably Pseudoephedrine, which has come up on the site a few times.
I must say that I'm in favour of splitting out the [medicine] synonym into its own tag to cover the former sense above.
But inherently ambiguous tags are always a bad idea. I don't think we should go with [drugs] for this reason. We should think about alternatives such as [illegal-drugs], [narcotics], [banned-substances], etc.
Related, if we split the [health] and the [drugs] tags into "good drugs" and "bad drugs" tags, I think the current [health] synonyms [vaccination], [immunisations], and [shots] should probably move over to being synonyms of the "good drugs" tag. If so would this make [medicine] non-ideal as the main tag? Also we could split just those three out into a new tag that covers them, in case which name would be best since maybe not all imminusations and vaccinations might require shots?
So let's discuss all these related topics. We don't have to come up with a definite all-encompassing answer just yet but the more thoughts and arguments we can get, the better.