Risperidone (market name: Risperdal) is an atypical antipsychotic medication. It is most often used to treat delusional psychosis.

Side Effects

Risperidone can potentially cause
tardive dyskinesia. Common side effects include: nausea, anxiety, dizziness, insomnia, low blood pressure, muscle-stiffness/pain, sedation, tremors, and weight-gain.

How it could make you feel and why?

Risperidone is a very strong dopamine blocker (antagonist); i.e., it inhibits functioning of dopamine receptors. It reaches peak plasma levels quickly regardless of whether it is administered as a liquid or pills. The strong dopamine-blocking reaction is known to make some people feel nauseated if they do things that normally trigger the dopamine response, such as eat a pleasing meal or experience orgasm. Risperidone is metabolised fairly quickly so this potential for nausea subsides usually in two to three hours.

Current forms

Risperidone is available in the form of ordinary tablets, fast-dissolving tablets, and solution taken orally, and in the form of a long-lasting injection, known as Risperdal Consta. The latter is especially important, due to the high percentage of mentally ill persons (especially with
schizophrenia) who are unable or unwilling to take daily medication orally because of their impaired ability to distinguish between reality and fantasy.

Risperdal is manufactured by Johnson & Johnson (NYSE: JNJ), which also makes Risperdal Consta in conjunction with Alkermes, Inc

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