belongs to SSRI
group of antidepressants. If you have tolerated and benifitted from it for two years and now are unable to get it, then first evaluate the need to continue it. If your psychiatrist
feels you still need an antidepressant two years after being well, then ask him if he could change it to any other available SSRI type antidepressants. This may help as all of them act in the same way.
If stopping it is thought to be the best option to take, DO NOT STOP SUDDENLY. You will have to keep reducing some fixed dose of medication periodically and then stop.
Yes, if you stop suddenly, it will cause something called as withdrawal reaction/problem as it is short acting unlike long acting antidepressant like Prozac/fluoxetene.
Hope this helps.