The nasal spray treats symptoms of severe anxiety without sedation.
The study assessed 63 students who were previously identified as having a wide range of trait levels of fear of guilt.
"The results of this new approach, which combines the drug with psychotherapy, were very encouraging"
11 percent of people with asthma, hay fever developed a mental health problem within a 15-year period.
The findings suggest effective and lasting approaches for symptoms of PTSD.