assessed the effect of combining CBT with drug medications. patients recieved either drugs and CBT together, CBT only, durgs only, or no treatment. patients in all groups, except the no - treatment group, showed improvements, but most symptom reducation was seen when drugs were combined with CBT, especially if drugs were given for the period first. this suggests that the most effective treatment is to first administer drugs to reduce symptoms, so that CBT can then have a more beneficial effect