redosing has been covered ad nausium...check the directory and you will find all you need to know.
A short run down is... if you are looking for the logest experience possible without diminishing returns, you take your first dose then a second 1-2 hours after.
Yeah that'd be nice right now,
I feel like a hungry hungry Horse!
Being honest with you OP,
Redosing isnt a particularly good idea,
you are near enough guaranteeing yourself for a comedown.
your best just popping a decent amount,
That should last in total 5 hours (last hour being in waves)
I usually then just chase that with K,
but if you havent got any of that available you'd probably just want to redose, but honestly though when you redose thats when the negatives will be much more apparant
Depends on the strength of your pills. If one is enough to get you peaking good, then just do another half about an hour after your drop. Or you can try and drop 1.5 initially and then eat the last half (if you have medium straighten pills).
One issue with redosing is that you will never feel higher than your initial dose.