2c-i freshness

[Nexus07083]

All psychedelics produce tolerance quickly, this tolerance dissappears just as quickly. However, 2c-i also seems to have an much more long term tolerance, less acute, obviously. This long term tolerance seems to be mostly to the visuals, the stimulant affects are unaffected. I've not noticed this with other 2c's, but then I've not used them nearly so often.

So how often could you do 2c-i without building a tolerance? As far as freshness, how long should it stay fresh for if left in the original baggie from CRC in the dark at room temp?