How long does Phenibut last?

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How long do the main effects of phenibut last?

At low to medium doses, phenibut’s main effects are a feeling of wellbeing (anti-anxiety), relaxation and a slight increase in sociability. At higher doses these effects are more noticeable with the extra alcohol-like effects such as pain-relief and easy, healthy sleep. Other effects include increased memory and learning abilities, and protection of the brain and heart from stress. Duration of the main effects of an average dose is around 4 – 5 hours, depending on the user’s metabolism and other factors. Higher doses will typically last longer than lower dosages.[2]

What is the ‘half-life’ of phenibut?

A chemical or substance’s half-life is the average amount of time taken for the substance to lose half of its effects in the body. So, if you take 500mg of phenibut, then the half-life is the amount of time until you can only feel half the effects – or roughly the same effects as a 250mg dose. Clinical studies in Russia have found the average half-life of phenibut to 5.3 hours, at doses of 200mg and 500mg. This helps us to understand why the main effects of phenibut are usually felt for around 4-5 hours.[3]

Does phenibut have side-effects?

Early clinical studies of phenibut did not find any side effects reported in low to medium doses. Now that phenibut is more widely available, there are some reports of side effects which include: more vivid dreams, numbness and aching joints. At higher doses side effects may include dizziness and drowsiness. The main ‘side-effect’ to watch out for is a tolerance build-up. Phenibut has a half-life of 5.3 hours, but it can remain in the body for days. This is why it’s recommended to only use phenibut two days per week, to prevent tolerance build-up.[4]  

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References:

Phenibut basics by Erowid, https://www.erowid.org/smarts/phenibut/phenibut_basics.shtml, retrieved 20-05-2016

How long does phenibut last? by James Smoot https://smartdrugsforcollege.com/how-long-does-phenibut-last/, retrieved 20-05-2016

HISTORY OF DRUG DEVELOPMENT – Phenibut, Lapin, 2001, CNS Drug Reviews

Vol. 7, No. 4, pp. 471–481

Phenibut Side Effects, Tolerance and Withdrawal Risk, by Nootriment editorial staff,  http://nootriment.com/phenibut-side-effects/, retrieved 20-05-2016

Encyclopedia of Mind Enhancing Foods, Drugs and Nutritional Substances, 2^nd edition, McFarland, 25 Feb 2015, David W. Group, p 186.

[1] Phenibut basics by Erowid, https://www.erowid.org/smarts/phenibut/phenibut_basics.shtml, retrieved 20-05-2016

[2] How long does phenibut last? by James Smoot https://smartdrugsforcollege.com/how-long-does-phenibut-last/, retrieved 20-05-2016

[3] HISTORY OF DRUG DEVELOPMENT – Phenibut, Lapin, 2001, CNS Drug Reviews

Vol. 7, No. 4, pp. 471–481

[4] Phenibut Side Effects, Tolerance and Withdrawal Risk, by Nootriment editorial staff,  http://nootriment.com/phenibut-side-effects/, retrieved 20-05-2016

[5] Encyclopedia of Mind Enhancing Foods, Drugs and Nutritional Substances, 2^nd edition, McFarland, 25 Feb 2015, David W. Group, p 186.

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