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How Long Does Phenobarbital Stay in Your System

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  • 18th October 2016

What is Phenobarbital

Phenobarbital is a drug of the barbiturate class, used to treat certain kinds of epilepsy in the developing world.

Phenobarbital Images

How long does Phenobarbital stay in your system

Phenobarbital has an exceptionally long elimination half-life of 53-118 hours, with a mean of 79 hours, this means that the drug will be eliminated from your system between 12 days and 27 days, with the mean being around 18 days.

This is liable to change depending on the following factors:

  • Age
  • Body mass
  • Liver and kidney conditions
  • Hydration levels
  • Diet
  • How long the drug is being taken (long term vs. short term)

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