Posted 06 September 2010 - 07:57 AM
With almost all nootropics it will be found that some or alittle of a substance will produce good positives with little negatives. AS the dosage increase side effects increase and positive benefits decrease, often becoming negative.
Furthermore it is very hard to determine subjectively wheather improvements exist. I have seen studies were modafinil increased IQ by 15-20 points without the test subjects being aware that they were enhanced(air force pilots, only applies to those with ~130IQ)
THere are so many test of cognitive function that could assist you in narrowing the range. It would be up to you to assess what weakness you wish to target, reaction speed, processing speed, verbal recall etc. I would however note that test are by definition narrow compared the holistic requirements of the brain. You could trust your instincts
In my opinion i would suggest piracetam dosages around 500mg, try higher but less than 2 grams for comparison. Piracetam facilitates NMDA transmission which puts stress on the brain, and for this reason i dont believe it should be the basis of a stack although it auguments it nicely.
Im sure others will have vastly different opinions.