Posted by ed_uk on August 1, 2005, at 13:43:13
In reply to Re: For Ed, posted by JACJ on July 31, 2005, at 19:00:06
Hi J,
Atypical APs cause TD at a rate of less than 1% per year (of continuous AP treatment) in young adults. TD is *much* more common in the elderly. TD is very rare in patients treated with APs for less than 3 months, 1 month in the elderly.
Am J Psychiatry. 2004 Mar;161(3):414-25.
Lower risk for tardive dyskinesia associated with second-generation antipsychotics: a systematic review of 1-year studies.Correll CU, Leucht S, Kane JM.
Department of Psychiatry Research, Zucker Hillside Hospital, North Shore-Long Island Jewish Health System, Schneider Children's Hospital, Glen Oaks, NY 11004, USA. ccorrell@lij.edu
OBJECTIVE: Based on lower rates of acute extrapyramidal side effects associated with second-generation antipsychotics, compared to first-generation antipsychotics, and based on preliminary data, second-generation antipsychotics are expected to cause less tardive dyskinesia than first-generation antipsychotics. This hypothesis was examined in a systematic review of studies involving open or controlled treatment with any second-generation antipsychotic. METHOD: Studies of treatment with second-generation antipsychotics lasting > or =1 year and reporting on new cases of tardive dyskinesia or dyskinesia were systematically reviewed. RESULTS: In 11 studies, 2,769 patients received treatment with risperidone (five studies, N=1,235), olanzapine (two studies, N=610), quetiapine (two studies, N=386), amisulpride (one study, N=331), or ziprasidone (one study, N=207) for a weighted mean and median duration of 263 and 306 days, respectively. Study designs were double blind and randomized (N=3); open-label extensions of double-blind, randomized trials (N=4); and open label (N=4). Of the four trials that had a comparator (all involving adults with schizophrenia spectrum disorders), three used haloperidol (N=408) and one used placebo (N=71). Studied populations included children (N=77), adults (N=1,419), adults and elderly persons (N=794), and exclusively patients age 54 years or older (N=479). The weighted mean annual incidence of tardive dyskinesia for second-generation antipsychotics was 0% in the children, 0.8% (range=0.0%-1.5%) in the adults, 6.8% in the mixed adult and elderly population, and 5.3% (range=0.0%-13.4%) in the patients age 54 years and older, compared to 5.4% (range=4.1%-7.4%) in adults treated with haloperidol. CONCLUSIONS: Results from 11 long-term studies support the idea that second-generation antipsychotics have a reduced risk for tardive dyskinesia, compared to first-generation antipsychotics, although the doses of haloperidol used in the comparator studies were relatively high. More carefully designed studies, ideally lasting beyond 1 year and comparing the effects of different second-generation antipsychotics in patients who have never taken first-generation antipsychotics, are needed to estimate the true risk. It would not appear premature for clinicians to consider these findings in making long-term treatment decisions.
~Ed
poster:ed_uk
thread:535356
URL: http://www.dr-bob.org/babble/20050728/msgs/536384.html