Clen has a biphastic elimination, which means that it is technically reduced in your body in 2 different stages. This isn’t particularly important, as a recent study has shown that for most intents and purposes, clen concentrations in the body decline with a ½ life (approximately) equivalent to 7-9.2hours and again up to as much as 35 hours later(4)(5). If you’re really interested, though, clen technically declines biphastically at 10 and then 36 hours. But really, in our little world, where we use ½ life to tell us when to take our next dose, who the hell is going to take clen, then a dose 10 hours later, then a dose 36 hours later? We’ll stick with the earlier 7-9 hour ½ life for dosing purposes, and take our clen every 3.5-4.5 hours that we’re awake, stopping early enough to still be able to get to bed. Clen can, in some people, cause insomnia (and as with all stimulants, can cause anxiety in some). Recently, it’s become popular to take a whopping dose of clen in the morning, and that’s it for the day. There’s nothing wrong with this, I guess, but I’d rather not go through that kind of roller-coaster of sweating and shaking until it wore off.
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Originally Posted by Linuxian
