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Summary sheet: Risperidone
Molecular structure of Risperidone
Chemical Nomenclature
Common names Risperdal
Substitutive name Risperidone
Systematic name 3-[2-[4-(6-fluoro-1,2-benzoxazol-3-yl)piperidin-1-yl]ethyl]-2-methyl-6,7,8,9-tetrahydropyrido[1,2-a]pyrimidin-4-one
Class Membership
Psychoactive class Antipsychotic
Chemical class Benzisoxazole
Routes of Administration

WARNING: Always start with lower doses due to differences between individual body weight, tolerance, metabolism, and personal sensitivity. See responsible use section.

Threshold 0.25 - 0.5 mg
Light 0.5 - 1 mg
Common 1 - 3 mg
Strong 3 - 6 mg
Heavy 6 mg +
Total 12 - 20 hours
Onset 20 - 60 minutes
Peak 2 - 8 hours
Offset 2 - 4 hours
After effects 12 - 24 hours

DISCLAIMER: PW's dosage information is gathered from users and resources for educational purposes only. It is not a recommendation and should be verified with other sources for accuracy.

Risperidone (trade name Risperdal) is an atypical antipsychotic medication used to treat schizophrenia, biploar disorder and irritability caused by autism. It it sometimes used as a sedative to reduce the effects of psychedelics like LSD and to induce sleepiness.



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Subjective effects

The effects listed below are based upon the subjective effects index and personal experiences of PsychonautWiki contributors. The listed effects should be taken with a grain of salt and will rarely (if ever) occur all at once, but heavier doses will increase the chances and are more likely to induce a full range of effects. Likewise, adverse effects become much more likely on higher doses and may include injury or death.

Physical effects

Cognitive effects

The general head space of risperidone is often described as one of sleepiness, emptiness, apathy, stupor and catatonia. The specific cognitive effects can be broken down into several components which progressively intensify proportional to dosage. These are described below and generally include:

Toxicity and harm potential


This toxicity and harm potential section is a stub.

As such, it may contain incomplete or even dangerously wrong information. You can help by expanding upon or correcting it.
We also recommend that you practice diligent independent research and the most thorough harm reduction practices when using this substance.

Legal issues

  • United Kingdom: The drug is available as a prescription medication.
  • United States: Risperidone is available only through prescription.
  • Australia: The substance is available only through prescription.

See also

External links


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