Below is a list of side effects I've personally experienced using various racetams. Post your own and let's see if we can get a decent thread going!
Piracetam - low blood pressure, dizziness upon standing, irritability, headaches (very rarely)
Aniracetam - Memory blanks (can't remember certain specific details at times. The only racetam where I get significant problems with memory recall. Noopept also produces similar memory glitches)
Phenylpiracetam - Insomnia, slightly depleted energy levels the day after
Fasoracetam - Blunted mood after continuous use
Oxiracetam - Blunted emotions, irritability slightly worse than Piracetam
I would consider all of these very minor side effects. In terms of the benefits, the positive aspects of using racetams outweigh the negative.
Piracetam - low blood pressure, dizziness upon standing, irritability, headaches (very rarely)
Aniracetam - Memory blanks (can't remember certain specific details at times. The only racetam where I get significant problems with memory recall. Noopept also produces similar memory glitches)
Phenylpiracetam - Insomnia, slightly depleted energy levels the day after
Fasoracetam - Blunted mood after continuous use
Oxiracetam - Blunted emotions, irritability slightly worse than Piracetam
I would consider all of these very minor side effects. In terms of the benefits, the positive aspects of using racetams outweigh the negative.