Misc GHB/GBL and DMAE interaction

[soryt]

I would like to combine Piracetam and DMAE (which increases level of acetylocholine in the brain) - I have heard that this is great combination to increase your brain ability. The problem is that there is a risk of interactions with GBL/GHB, acording erowid trip raports below:

http://www.erowid.org/experiences/exp.php?ID=69282
http://www.erowid.org/experiences/exp.php?ID=26312

Is it true?

I bought Choline Bitartrate as well. Will I have the same problem like GBL and DMAE?