Yeah I sip my drink throughout the day, but I also have plenty of water with me to drink as well.
Yes OXI does have an immediate effect, moreso than a longterm effect I think. It's a bit of a 'one hit wonder' as far as I can gather, so unlike the vinpo which gets better over time before levelling off, the OXI can be taken as a single dose, yet show evedince of improving recall and memory of stuff learned whilst 'under the influence' of the OXI.
Vinpo: 2 x 10mg or 3 x 10mg, or sometimes as much as 30mg in one go. Depends how I'm feeling.