Which of the Following Statements About Antipsychotic Medications Is True

Which of the following statements about antipsychotic medications is true?

A) Large numbers of clinical trials have failed to demonstrate the efficacy and effectiveness of these drugs.
B) Some clinical change can be seen within the first 24 hours, but drops off rapidly after that.
C) These medications can take 2 to 4 weeks to have any effect on the patient.
D) The earlier patients receive these medications, the better they tend to do over the longer term.