Entrop/Phenotropil (Phenylpiracetam) is a Russian nootropic drug with stimulant action.

By its chemical structure, phenylpiracetam is a derivative of Piracetam (a reference nootropic drug) with phenyl ring added. This difference in chemical structure significantly improved the ability of this particular racetam to penetrate the blood-brain barrier and reach the brain.

Entrop has pronounced antiamnesic, neuroprotective, and stimulant properties and is also shown to possess moderate anxiolytic activity, unlike common stimulants which often cause anxiety.


  • Psychostimulating effect combined with anxiolytic properties i.e. mood lifting and anxiety reduction  
  • Adaptogenic effects
  • Increased resistance of brain tissue to hypoxia and toxins.
  • Better visual acuity and range.
  • Immunostimulating properties.

Indications for use

  • Decreased memory and attention
  • Fatigue
  • Mild and moderate depression
  • Central nervous system dysfunctions followed by cognitive impairments and decrease of motor activity
  • Obesity
  • Symptomatic treatment of chronic alcoholism

Professional athletes should note than Phenotropil is included on WADA list of prohibited substances

Dosage and administration

The dosage should be assessed individually. Usual dosage is 100-200mg 1-2 times a day. The maximum daily dose is 750mg. The duration of the treatment course is ranging from two weeks to three months. The course can be repeated after a month if necessary.

Side effects

  • Insomnia;
  • Psychomotor agitation;
  • Hyperaemia;
  • Hypertension.


  • Hypersensitivity;
  • Pregnancy and lactation;
  • Age below 18 years old;
  • Liver and kidney disorders;
  • Psychotic disorders.

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