A medication's "half-life" is a simple standard of reference. It assists prescribing physicians/PA's/NP's in comparing the length of time medications remain active and effective in the body. This elapsed time often influences a prescriber's choice of medication based on individual patient need. The term comes from the length of time it takes for half of the original dose of the drug to remain in the patient's bloodstream. One example of this is the comparitively long half-life of the older tranquilizer Valium (diazepam) vs. the very short half-life of Xanax (alprazolam) a much newer tranquilizer which has become widely prescribed due in part to its fast-acting, yet quickly subsiding effect.
I'm not a doctor but I play one on the internet..
-Fast Eddie, 9-30-11
The average half life of Focalin is 3 hours. If dosed properly, one will have 3 hours of focus and 3 more hours of mild after effects (insomnia). The last dose should be taken at least 6 hours before trying to sleep, or else one may experience insomnia.
Concerta(R) is methyl phenyl(piperidin-2-yl)acetate(IUPAC name),
chemically known as methylphenidate (also MPH, Ritalin, Metadate or Methylin)
Half-life: 2-4 hours
Focalin is an amphetamine which can stay in the system for up to 48 hours. In a urine drug test the drug is detectable for up to 7 days.
Focalin is a central nervous system (CNS) stimulant. An over dosage of Focalin can have possible side effects. It stays almost 27 hours in your system
how long does focalin stay in your system i need to pas a drug test
According to the drug guide, the half-life of Focalin (XR) is 2 - 4.5 hrs., which means it could stay in the system for five to six times that, or up to 27 hrs.
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