As of 2020, studies on the use of adjunct d-cycloserine are inconclusive. Prognosis
The majority of those that develop a specific phobia first experience symptoms in childhood. Often individuals will experience symptoms periodically with periods of remission before complete remission occurs. However, specific phobias that continue into adulthood are likely to experience a more chronic course. Specific phobias in older adults has been linked with a decrease in quality of life. Those with specific phobias are at an increased risk of suicide. Greater impairment is found in those that have multiple phobias. Response to treatment is relatively high but many do not seek treatment due to lack of access, ability to avoid phobia, or unwilling to face feared object for repeated CBT sessions. Epidemiology
Specific phobia is estimated to affect 6-12% of people at some point in their life. There may be a large amount of underreporting of specific phobias as many people do not seek treatment, with some surveys conducted in the US finding that 70% of the population reports having one or more unreasonable fears.Specific phobias have a lifetime prevalence rate of 7.4% and a one-year prevalence of 5.5% according to data collected from 22 different countries. The usual age of onset is childhood to adolescence. During childhood and adolescence, the incidence of new specific phobias is much higher in females than males. The peak incidence for specific phobias amongst females occurs during reproduction and childrearing, possibly reflecting an evolutionary advantage.
There is an additional peak in incidence, reaching nearly 1% per year, during old age in both men and women, possibly reflective of newly occurring physical conditions or adverse life events. The development of phobias varies with subtypes, with animal and blood injection phobias typically beginning in childhood (ages 5–12), whereas development of situational specific phobias (i.e., fear of flying) usually occurs in late adolescence and early adulthood.In the US, the lifetime prevalence rate is 12.5% and a one-year prevalence rate of 9.1%. An estimated 12.5% of U.S. adults experience specific phobia at some time in their lives and the prevalence is approximately double in females compared to males. An estimated 19.3% of adolescents experience specific phobia, but the difference between males and females is not as pronounced. See also
List of phobias
Phobia

References
External links
Encyclopedia of Mental Disorders – Specific phobias