Two commonly used antipsychotic medications--Haldol and Risperdal--may not be as effective as a sugar pill in helping some patients control aggressive outbursts, a new study suggests. British researchers studied 86 adults with low IQs and found that 79 percent of the patients taking a placebo reduced their aggressive outbursts, while 65 percent of those taking one of the two antipsychotic meds experienced a decrease in the aggressive behavior. The study's lead author said that the sudden...