I prefer "#nauseated" just as I prefer "an" before "historic" and other H words with an unstressed first syllable, but that doesn't mean I'm the only person who's not wrong.

#Language changes over time, and it varies by region, as well. It's okay to say you're #nauseous when you're feeling #barfy.
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Nauseous Definition & Meaning - Merriam-Webster
https://www.merriam-webster.com/dictionary/nauseous#:~:text=Kids%20Definition-,nauseous,or%20causing%20nausea%20or%20disgust

#Cloverfield gave me #vertigo and made me #nauseated.