Promethazine as antiemetic?

[SmollMushroom]

Here we are again, I wasn't able to get any of the anitemetics suggested in the SN regimen thread, so I was wondering if Promethazine could be used as antiemetic and in which dose?
If some good soul wants to guide me step by step in DMs on how to buy Olanzapine or any good antiemetics from a reliable source from the dark web I'm down for that too.
I've never been on the dark web and I have no clue on where to go to buy that stuff.

 

[SmollMushroom]

Sorry to up but I'd really need an answer for this, if anyone can help.
In the leaflet it says that Promethazine hydrocloride can be used to prevent vomiting but I don't know how efficient it is for SN, anyone knows?