It's different for everyone like most things. I'm going through the process now. My dr told me to take 60mg every other day for a week and then to switch to 30 mg every other day for a week and then stop. From the beginning I would experience at least a headache and some dizziness by about half way through my 'off' day. I anticipated this as I had missed a dosage before and noticed this. My first few days on 30 mg was rough.
My last dosage of 30 mg was Saturday. For me the headache has been pretty constant regardless of taking over the counter meds. The dizziness/nausea picked up the last couple days too, along with unpleasant digestive issues. Dramamine helps some (be sure to get the less drowsy kind if you plan to function). These have been unpleasant, but tolerable for the most part. For me the biggest struggle has been just feeling mentally 'foggy' I guess you could say. I've had a hard time focusing and obtaining info...I work full time and am taking a class, so it's pretty noticable for me. I made several uncommon errors at work yesterday. I just feel kind of out there.
Just try what you think will work best for you and go from there...it hasn't been as terrible as I thought it would be, so I think I've been lucky. It helps me to eat every few hours to help with the nausea and drink a lot of water. I tend to drink a lot of water anyways, but days I haven't the headaches seem more severe. I haven't tryed L-theanine, but am going to get some today as I have read a lot of good reviews about it helping.
Good luck...we all feel your pain. I feel like family and friends can't fully understand the fog I'm in. We have each other!
p.s. If there are lots of typos I blame my withdrawals.