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ing traffic to enter the Los Angeles freeway in either direction from a single ramp. The changes essential to achieving the conversion are as follows: (I) all clinical laboratories must report in SI units, (2) medical journals and textbooks must report in SI units, and (3) students must be taught in SI units. This conversion process worked in Canada and Great Britain. Two commentaries appear in this issue of the journal that offer valuable remarks on the SI issue. The Annals of Pharmacotherapy wishes to use this occasion to announce Editorials that our SI policy remains unchanged. For the aid of readers, the journal will publish, in each issue, a concise, comparative reference table of common laboratory values.

chiatrie) were also searched. One report of neck dystonia related to quetiapine was found. Raja and Azzoni 3 reported a case of neck dystonia first with risperidone and later with quetiapine in one patient. The manufacturer of quetiapine (AstraZeneca) was contacted and stated that quetiapine-related neck dystonia is a very rare event, but was not aware of any published papers concerning quetiapine and neck dystonia or torticollis. As the event developed with monotherapy, other drug-related causes were ruled out. An alternative cause could have been idiopathic dystonia, which often appears to have a strong psychogenic component, but the course of the adverse drug reaction makes this explanation more unlikely. 4 This adverse event is considered probable according to the Naranjo probability scale. 5The frequency of extrapyramidal symptoms with second-generation antipsychotics seems to be lower than with first-generation antipsychotics. The same is true for quetiapine, although there are a few cases of tardive dyskinesia and acute dystonia related to quetiapine without any previous or questionable treatment with the first-generation agents. 6