The card i gave you is about Cicatrene, of johnson & johnson, how it is distributed in Italy for human topic use, that includes: neomicina solfato 3.300 UI;Bacitracina zinco 250 UI; Glicina 10 mg; L-Cisteina 2 mg; DL-Treonina1 mg.
It is considered essential when you need to save a cactus from rotting from local expertises and for my experience too. I find it usefull also for other suffering plants, like Dieffenbachia, not for propagating but for enforcing or saving it, when you have to save a long trunk which has lost most of the leaves at the bottom.(How can I renew a Dieffenbachia that has lost all its lower leaves?)
That's what i was trying to explain here (How do I treat the survived parts of a cactus after some of it has rotten to prevent the problem spreading?), with very little success because of my bad English.
I use it with Dracaena too, cause of its large trunk, fill of veins, and in other cases, generally depending on trunks, before covering it with wax plug. And yes, it is propagating. Since i think that air is full of bacteria.
Not in all cases of propagation. If the stems are thin and green, and especially healthy (when I multiply the sedum or geraniums, for example), I do not use antibiotics. Nor for the parts that go directly on the ground, nor for those who remain in the air. Because they dry very quickly and a bacterial infection from the air is unlikely.