SSRIs need to be taken daily, and most people should start to see improvements within a few weeks of starting on them
. If they do not see any improvement by then, they should check with their doctor to see if they need a higher dose. Some people may need to stay on SSRIs for a while, but others may be able to work with their doctor to wean off of the medication after a year.
Overall, the closer an attack sufferer works with their doctor when taking SSRIs, the better chance they have of controlling their panic attacks.