My gf and I rolled a few days ago.
It was her third. The very first time, she didn't feel much, second time was at monster massive and felt claustrophobic so she felt ill.
This time though, she felt super nauseous and was gagging. We were just in my room, in hopes that she'll have a better exp than last time. I'm not sure why she felt very nauseous; she looked reallyyy terrible.
I took the same pills, but still had an awesome roll. And in my experience, I've never felt nausea.
I guess it really just depends on the person. I didn't eat, so I thought I would roll suupperr hard. I did, but no as much as her and she had eaten hours before.