I wrote about this very item in reply to Kotti’s post about it being useless. I said that I like to use this quite a bit and the reason is because it gives a reaction to make space for you too if you know how and when to use it.
For eg. You have 2 guys standing their post. A drinking glass is there for guy 2 while guy 1 blocks the way. If you use emetic, only guy 2 reacts and goes to puke while guy 1 is still in your way. If you use poison, you kill guy 2 andnruin your SA. If you use sedative, guy 2 passes out, guy 1 Notices and leaves his post to wake up guy 2. Which gives you access or a path past guy 1.
It can also be used for distraction to walk past enforcers.
Ive used this in Paris, Italy and Morocco. Haven’t tried in Thailand yet. But it is useful if you need to open up space.
And I actually like it a lot.