B6 Dosage for Hyperemesis Gravidarum?

I could only find the 100 mg vitamins at the store. I’ve read a lot that says only to take 25mg 2-3x/day, but I just popped a whole one before reading that (🙄). How much should I take, or should I just order 25mg from amazon? I’m on Zofran (one a day) but I’d like to try and wean myself away from it as much as I can. Also I got the Unisom sleep tablets to take.