PubMed · 8350694
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K Tourian, D Ross. 1993. Panic disorder: a commentary.. https://pubmed.ncbi.nlm.nih.gov/8350694/
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Charles Darwin (1809-1882) suffered from a chronic illness that, throughout much of his adult life, impaired his functioning and severely limited his activities. The writings of this famous scientist as well as biographical materials indicate that he probably suffered from an anxiety disorder. His symptoms, when considered individually, suggest a variety of conditions, but taken together they point toward panic disorder with agoraphobia. This diagnosis brings coherence to Darwin's activities and explains his secluded lifestyle, including difficulty in speaking before groups and meeting with colleagues.
BACKGROUND: We determined whether blindness in a double-blind randomized controlled trial of alprazolam and exposure therapies in patients with panic disorder and agoraphobia was maintained in assessors and patients, what were the factors related to "unblinding," and whether unblinding was associated with clinical outcome. METHOD: In 129 patients with panic disorder and agoraphobia who were randomized to alprazolam-exposure, placebo-exposure, alprazolam-relaxation, or placebo-relaxation conditions, blindness was tested at the end of treatment by the independent assessors' and patients' classification of the treatment condition. RESULTS: Assessors' classifications were correct in 82% of the alprazolam group and 78% of the placebo group; corresponding figures for patients' classifications were 73% and 70%, respectively. Factors associated with unblinding included drug side effects but not assessors' ratings of treatment outcome. CONCLUSION: Judgment of the validity of the outcome of a randomized controlled trial is easier if the report notes not only the use of a double-blindness procedure but also details how blind the raters remained and how any unblinding affected their ratings of clinical outcome.
In the treatment of panic disorder double-blind controlled studies have demonstrated that imipramine (IMI) was effective at doses higher than 125 mg/day. However a high rate of dropouts because of side effects has been reported in these subjects. In clinical settings, the administration of benzodiazepines (BDZ) in combination with IMI has been proposed to reduce the frequency and severity of side effects. In this naturalistic study, 49 patients affected by panic disorder with agoraphobia (n = 36) or without agoraphobia (n = 13) were treated with IMI plus lorazepam (LRZ) and followed for 12 months. The mean effective doses were 63.5 +/- 35.5 mg/day for IMI and 2.4 +/- 1.3 mg/day for LRZ. During the follow-up period, panic attacks disappeared in 75.5% of patients and 69.5% of agoraphobics were free of phobic avoidance. The patients with comorbid mood disorders and longer duration of illness required higher doses of both drugs. The combined treatment of IMI and LRZ allowed the use of low doses of the drugs, reduced the frequency and severity of the side effects and improved patient compliance. In fact, only 1 patient (2%) dropped out because of the severity of side effects. Furthermore, the patients who tapered LRZ treatment did not show BDZ withdrawal syndrome.