ingredients are very similar to C2, w/ a couple additions
as far as the eye twitching, i am not sure the product is causing this- maybe you are just special
as far as the constriction of the pupils- this is my short explanation (don't want to bore you

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any time there is beta stimulation (in the case of ephedrine, beta II and some beta I stimulation; it is non-specific) and sympathetic nervous activity, the opposite occurs (pupil dialation), at least to some extent- taking stims mimicks the fight or flight response, w/ all the classic signs: vasoconstriction of blood vessels, dry mouth, sweating, etc.
However, to even out your system once the effects of the stims have worn off- the parasympathetic nervous system works overtime to maintain homeostasis- kind of a compensatory thing- you will notice this the most first thing in the morning after sleep, b/c the parasympathetic ns is most dominant during this time, and even more so when compensating from stim usage. things you will notice if you do some type of stims (if you look carefully) when you first wake up are:
very constricted pupils
drooling on your pillow (no bs)
very SLOW resting hr in the morning (pre-stim of course)
really interesting how the body works sometimes
