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RisperidoneThis page contains recent news articles, when available, and an overview of Risperidone but does not offer medical advice. You should contact your physician with regard to any health issues or concerns.Overview: Risperidone (when available) Risperidone is an atypical antipsychotic medication. It is most often used to treat delusional psychosis (including schizophrenia), but Risperidone is also used to treat some forms of bipolar disorder and psychotic depression. It also has shown some success in treating symptoms of Asperger's Syndrome and autism. Risperidone is now the most commonly prescribed antipsychotic medication in the United States. For the treatment of schizophrenia Mechanism Of Action: Blockade of dopaminergic D2 receptors in the limbic system alleviates positive symptoms of schizophrenia such as hallucinations, delusions, and erratic behavior and speech. Blockade of serotonergic 5-HT2 receptors in the mesocortical tract, causes an excess of dopamine and an increase in dopamine transmission, resulting in an increase in dopamine transmission and an elimination of core negative symptoms. Dopamine receptors in the nigrostriatal pathway are not affected by risperidone and extrapyramidal effects are avoided. Like other 5-HT2 antagonists, risperidone also binds at alpha(1)-adrenergic receptors and, to a lesser extent, at histamine H1 and alpha(2)-adrenergic receptors. News Articles on Risperidone Mylan subsidiary gets FDA approval for ANDA for Risperidone ... - 16 Sep 2008 Risperidone Tablets, used to treat schizophrenia and bipolar disorder, are the generic version of Janssen's Risperdal Tablets. by RTT Staff Writer. RTT News, For kids, older antipsychotic drug may be better - 16 Sep 2008 Researchers at the University of North Carolina at Chapel Hill have found that the old standby molindone is as effective as olanzapine and risperidone in Los Angeles Times, First generation antipsychotic drugs as effective as newer ones in ... - 16 Sep 2008 Between 2002 and 2006 the study randomly assigned 119 people aged 8 to 19 years to receive molindone, olanzapine or risperidone over an eight-week period at Media Newswire (press release), Study questions use of newer antipsychotic drugs in children - 16 Sep 2008 The study conducted from 2002 to 2006, involved 119 people aged 8 to 19 years who were randomly assigned to receive molindone, olanzapine or risperidone News-Medical.net, Quetiapine-Related Dysphagia - 16 Sep 2008 Before being prescribed quetiapine and valproate, she had received olanzapine (discontinued after 3 weeks because of weight gain), risperidone (discontinued Psychosomatics (subscription) Massage therapy for cancer patients - 16 Sep 2008 Children and adolescents diagnosed with the mental condition are nearly always prescribed more recently approved medications like Risperidone and Olanzapine Bay News 9, Mylan Pharmaceuticals Inc. wins FDA OK for Risperdal - 16 Sep 2008 By Steve Gelsi , , ) on Tuesday said the US Food & Drug Administration approved its abbreviated new drug application for Risperidone Tablets USP, MarketWatch Older antipsychotic drugs get new respect - 16 Sep 2008 The patients were randomly assigned to take one of three drugs: olanzapine, which goes by the brand name Zyprexa; risperidone, sold as Risperdal; Kansas City Star, Older anti-psychotic drug has plus - 16 Sep 2008 The patients were randomly assigned to take one of three drugs: olanzapine, which goes by the brand name Zyprexa; risperidone, sold as Risperdal; Kentucky.com, AP Enterprise: Report prompts more water tests - Sep 11, 2008 3 (meprobamate, phenytoin, risperidone) San Francisco: no detections San Diego: 4 (ibuprofen, meprobamate, phenytoin, risperidone) Southern California: 3 The Associated Press Teva says it has lost exclusivity on Risperdal - Sep 15, 2008 The Israeli company launched its version of risperidone tablets on June 30, and based on an earlier ruling, it expected the Food and Drug Administration CNNMoney.com US Court vacates Teva exclusivity on generic antipsychotic drug - Sep 15, 2008 Columbia has vacated an April 2008 ruling, which granted Teva 180-day exclusivity for its Risperidone tablets, AB-rated to Janssen's Risperdal tablets. Trading Markets (press release), Teva Pharmaceutical Drops In Pre-Market On Court Decision - Sep 15, 2008 The previous ruling granted the company 180-day exclusivity for its Risperidone Tablets, AB-rated to Janssen's Risperdal Tablets. RTT News, Risperidone Improves Cognitive Skills in Children With Autism - Aug 27, 2008 BETHESDA, Md -- August 27, 2008 -- Risperidone (Risperdal) does not negatively affect cognitive skills of children with autism, and may lead to improvements DG News Antipsychotics May Decrease the Risk of Suicide - Sep 11, 2008 A recent study published in the Journal of Clinical Psychiatry reported that adding the atypical antipsychotic drug risperidone to standard antidepressant GNIF Brain Blogger, Teva Announces Appellate Court Reverses Generic Risperdal(R ... - Sep 13, 2008 Columbia has vacated an April 2008 ruling, which granted Teva 180-day exclusivity for its Risperidone Tablets, AB-rated to Janssen's Risperdal® Tablets. WELT ONLINE, Syntropharma Closes £1.25 Million ($2.4 million) Investment Funding - Sep 10, 2008 Additionally, the funds will allow Syntropharma to progress other products in its pipeline, including Risperidone – to treat delusional psychosis (including PharmaLive.com (press release), Health warnings failed to curb use of antipsychotic drugs in ... - Aug 25, 2008 Of the three drugs, only risperidone is approved by Health Canada to treat symptoms of aggression and psychosis in elderly patients with dementia, CBC.ca, Risks And Benefits Of Antipsychotics In Children And Adolescents - Sep 2, 2008 In our context, the most commonly prescribed antipsychotics in this population are risperidone, quetiapine, and olanzapine (Castro-Fornieles et al., Science Daily (press release) Anti-psychotic scrips rise by 10% - Aug 20, 2008 But the figures show that in 2006 GPs signed off 1438431 prescriptions for olanzapine and 1042385 for risperidone. The following year, the number of Healthcare Republic Costs and effects of paliperidone extended release compared with ... - Aug 28, 2008 ...a new pharmaceutical treatment for the management of schizophrenia, with the most frequently prescribed oral treatments in Greece (namely risperidone, 7thSpace Interactive (press release), Stolen drugs spark health warning - Aug 31, 2008 ...which contained a quantity of the victim’s prescription drugs, Zapain, Mirtazapine, Dosulepin, Penicillin, Omeprazone and Risperidone. This Is Lancashire, Antipsychotic Use in Children and Adolescents: Minimizing Adverse ... - Aug 26, 2008 At the time of this writing, only three antipsychotics—haloperidol, thioridazine, and risperidone—have been approved for use in children and adolescents by Focus (subscription) Ask more questions about medications - Aug 18, 2008 For instance the anti-depressant drug Citalopram may not mix well with the anti-psychotic drug Risperidone slowing its metabolism through the liver and North Island Midweek, Novacea, Inc. and Transcept Pharmaceuticals, Inc. Sign Merger ... - Sep 1, 2008 Transcept is also developing two novel fixed dose combination product candidates, TO-2060 (olanzapine/ondansetron) and TO-2061 (risperidone/ondansetron), MarketWatch Diagnosis: Misunderstood - Sep 13, 2008 By Jimmy Mincin, jmincin@altoonamirror.com n Four anti-psychotic medications that have been approved by the FDA to treat autism are clozapine, risperidone, Altoona Mirror, White matter volume changes in people who develop psychosis - Aug 31, 2008 Following the onset of psychosis, all patients but one received atypical antipsychotic medication (nine patients were treated with 1–3 mg risperidone; British Journal of Psychiatry (subscription), Antipsychotic Drugs Linked to Increased Stroke Risk - Sep 5, 2008 On the basis of these results, Health Canada and Janssen-Ortho, the maker of risperidone, issued a warning to prescribers. In 2004, the United Kingdom's Medscape (subscription) Market Report -- In Play (WIRES) - Sep 14, 2008 ...which granted Teva 180-day exclusivity for its Risperidone Tablets, AB-rated to Janssen's Risperdal Tablets; as a result of this decision, MSN Money Intensive Family Therapy Helps Stabilize Depression in Bipolar Teens - Sep 11, 2008 ...valproate, quetiapine, aripiprazole, and risperidone) on the basis of consensus treatment guidelines (Kowatch et al. J Am Acad Child Adolesc Psychiatry. Medscape (subscription) Syntropharma raises £1.25m to push drug patch - Sep 10, 2008 The cash will also be used to develop other patch-delivered drugs such as a version of Risperidone, which is used to treat delusional psychosis, The Herald, Stroke 'risk' for dementia patients - Sep 1, 2008 In March 2004, the UK's Committee on Safety of Medicines (CSM) recommended that the atypical drugs risperidone or olanzapine should not be used in people The Press Association Learn about the World CNS Therapeutics Market - Sep 4, 2008 Solian, Risperidone, Geodon and Others (includes corresponding Graph/Chart) III-35 European CNS Market Offers Untapped Opportunities III-35 Competitive MarketWatch CNS Drug Discoveries: Schizophrenia Chapter Answers Questions Such ... - Aug 29, 2008 All the leading brands face patent expiry (in the US) by 2014, with the first generic, risperidone, in mid-2008. Innovation within the market has been MarketWatch Antipsychotic drugs double stroke risk: study - Aug 28, 2008 The most widely used newer drug in the study was Johnson & Johnson's Risperdal, known generically as risperidone, the researchers said. Reuters New Research To Refine Approaches In Psychotherapy - Sep 8, 2008 ...management (PMT) plus methylphenidate (Ritalin), a stimulant; or (b) PMT plus methylphenidate plus risperidone (Risperdal), an antipsychotic medication. eMaxHealth.com, Normal Pressure Hydrocephalus Presenting as Othello Syndrome: Case ... - Sep 2, 2008 ...quetiapine, and risperidone in the treatment of psychotic symptoms in dementia patients, although the time to discontinuation due to lack of efficacy Am J Psychiatry (subscription) Shelby Township study seeks cure for effects of schizophrenia - Sep 5, 2008 ...age 35 and currently taking one of five medications for schizophrenia, which include olanzapine, risperidone/paliperidone, quetiapine or aripiprazole. Shelby Township Source Newspapers, On The Pulse - 5th September 2008 - Sep 5, 2008 There is already some evidence to suggest a link between atypical antipsychotics such as risperidone and stroke in the elderly. A Study in the BMJ now shows OnMedica, Corcept Therapeutics and Lilly Continue Collaboration - Sep 4, 2008 ...risperidone (Risperdal), quetiapine (Seroquel) and clozapine (Clozaril), are associated with varying degrees of treatment emergent weight gain, RedOrbit, Cognitive and Global Outcome in Schizophrenia Patients Related to ... - Sep 3, 2008 Twelve patients were treated with atypical antipsychotics (olanzapine, clozapine, risperidone, and quetiapine). For neuropsychological assessment DG News DESPITE THRE MAJOR SAFETY WARNINGS - Sep 3, 2008 ...about the atypical papers is that maybe these to climb in the wake of safety antipsychotic drug risperidone, warnings aren't enough," said warnings, Chatham Daily News, FDA Issues Complete Response Letter for Schizophrenia Drug - Sep 2, 2008 The product is a metabolite of Risperdal (risperidone), another atypical antipsychotic drug. Upon approval, paliperidone palmitate will be marketed in the FDA news (subscription), Antipsychotics Confirmed to Increase Stroke Risk in Elderly - Aug 29, 2008 Of the atypicals, risperidone (Risperdal) was used in 81% and olanzapine (Zyprexa) in 18%. The study design did not allow Drs. Douglas and Smeeth to MedPage Today, BUYINS.NET: (ALKS) SqueezeTrigger Price is $13.233. There is ... - Aug 28, 2008 RISPERDAL CONSTA (risperidone), long-acting injection, is a long-acting atypical antipsychotic medication for use in schizophrenia and is marketed worldwide Trading Markets (press release), Medical marijuana proves a valuable treatment for autism - Aug 25, 2008 Many drugs are used to control these kinds of behaviors in autistic individuals, including risperidone (Risperdal), which has a large range of highly toxic PR CannaZine (press release), Acupuncture for Psychiatric Illness: A Literature Review - Aug 30, 2008 Newer agents such as Risperidone have a relatively safer profile and result in lower recurrence rates.37 TCM categorizes schizophrenia as 2 types: RedOrbit, New Research Study Seeks Improved Quality of Life for People in ... - Aug 25, 2008 ...age 35 and currently taking one of five medications for schizophrenia which include olanzapine, risperidone/paliperidone, quetiapine or aripiprazole. NewsLI, Bipolar disorder: What you need to know - Sep 3, 2008 Atypical antipsychotic medications, including clozapine (Clozaril ® ), olanzapine (Zyprexa ® ), risperidone (Risperdal ® ), quetiapine (Seroquel ® ) Food Consumer, New Research Study Seeks Improved Quality of Life for People in ... - Sep 15, 2008 ...age 35 and currently taking one of five medications for schizophrenia which include olanzapine, risperidone/paliperidone, quetiapine or aripiprazole. California Chronicle, Brand Names/Synonyms: Risperidone is also known by the following brand names and/or synonymsCHEMBANK1795; R118; Remeron; Risperdal; Risperdal Consta; Risperdal M-Tab; Risperidal M-Tab; Risperidona [Spanish]; Risperidone; Risperidone [Usan:Ban:Inn]; Risperidonum [Latin]; Risperin; Rispolept; Rispolin; Sequinan Drug Category: Risperidone is categorized under the following by the FDA: Antipsychotics; Antipsychotics; ATC:N05AX08 Dosage Forms: Tablets and oral solution Absorption: Risperidone is well absorbed. The absolute oral bioavailability of risperidone is 70% (CV=25%). The relative oral bioavailability of risperidone from a tablet is 94% (CV=10%) when compared to a solution. Pharmacokinetic studies showed that RISPERDAL® M-TAB™ Orally Disintegrating Tablets and RISPERDAL® Oral Solution are bioequivalent to RISPERDAL® Tablets Interactions: -->Interactions for Risperidone: The interactions of RISPERDAL® and other drugs have not been systematically evaluated. Given the primary CNS effects of risperidone, caution should be used when RISPERDAL® is taken in combination with other centrally acting drugs and alcohol. Because of its potential for inducing hypotension, RISPERDAL® may enhance the hypotensive effects of other therapeutic agents with this potential. RISPERDAL® may antagonize the effects of levodopa and dopamine agonists. Amytriptyline does not affect the pharmacokinetics of risperidone or the active antipsychotic fraction. Cimetidine and ranitidine increased the bioavailability of risperidone, but only marginally increased the plasma concentration of the active antipsychotic fraction. Chronic administration of clozapine with risperidone may decrease the clearance of risperidone. Carbamazepine and Other Enzyme Inducers In a drug interaction study in schizophrenic patients, 11 subjects received risperidone titrated to 6 mg/day for 3 weeks, followed by concurrent administration of carbamazepine for an additional 3 weeks. During co-administration, the plasma concentrations of risperidone and its pharmacologically active metabolite, 9-hydroxyrisperidone, were decreased by about 50%. Plasma concentrations of carbamazepine did not appear to be affected. The dose of risperidone may need to be titrated accordingly for patients receiving carbamazepine, particularly during initiation or discontinuation of carbamazepine therapy. Co-administration of other known enzyme inducers (e.g., phenytoin, rifampin, and phenobarbital) with risperidone may cause similar decreases in the combined plasma concentrations of risperidone and 9-hydroxyrisperidone, which could lead to decreased efficacy of risperidone treatment. Fluoxetine and Paroxetine Fluoxetine (20 mg QD) and paroxetine (20 mg QD) have been shown to increase the plasma concentration of risperidone 2.5-2.8 fold and 3-9 fold respectively. Fluoxetine did not affect the plasma concentration of 9-hydroxyrisperidone. Paroxetine lowered the concentration of 9-hydroxyrisperidone an average of 13%. When either concomitant fluoxetine or paroxetine is initiated or discontinued, the physician should re-evaluate the dosing of RISPERDAL®. The effects of discontinuation of concomitant fluoxetine or paroxetine therapy on the pharmacokinetics of risperidone and 9-hydroxyrisperidone have not been studied. Lithium Repeated oral doses of risperidone (3 mg BID) did not affect the exposure (AUC) or peak plasma concentrations (Cmax) of lithium (n=13). Valproate Repeated oral doses of risperidone (4 mg QD) did not affect the pre-dose or average plasma concentrations and exposure (AUC) of valproate (1000 mg/day in three divided doses) compared to placebo (n=21). However, there was a 20% increase in valproate peak plasma concentration (Cmax) after concomitant administration of risperidone. Digoxin RISPERDAL® (0.25 mg BID) did not show a clinically relevant effect on the pharmacokinetics of digoxin. Drugs That Inhibit CYP 2D6 and Other CYPIsozymes Risperidone is metabolized to 9-hydroxyrisperidone by CYP 2D6, an enzyme that is polymorphic in the population and that can be inhibited by a variety of psychotropic and other drugs. Drug interactions that reduce the metabolism of risperidone to 9-hydroxyrisperidone would increase the plasma concentrations of risperidone and lower the concentrations of 9-hydroxyrisperidone. Analysis of clinical studies involving a modest number of poor metabolizers (n 70) does not suggest that poor and extensive metabolizers have different rates of adverse effects. No comparison of effectiveness in the two groups has been made. In vitro studies showed that drugs metabolized by other CYPisozymes, including 1A1, 1A2, 2C9, 2C19, and 3A4, are only weak inhibitors of risperidone metabolism. There were no significant interactions between risperidone and erythromycin. Drugs Metabolized by CYP 2D6 In vitro studies indicate that risperidone is a relatively weak inhibitor of CYP 2D6. Therefore, RISPERDAL® is not expected to substantially inhibit the clearance of drugs that are metabolized by this enzymatic pathway. In drug interaction studies, risperidone did not significantly affect the pharmacokinetics of donepezil and galantamine, which are metabolized by CYP 2D6. |
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