Its a relatively new Antidepressant, and you should be able to find much material about it if you do a search through a search engine like google.com, both for the trade name Cymbalta, and perhaps also for Duloxetine, its chemical name. If it has been prescriebd for you, your doctor should have given you full information, and the pharmacist should be able to supply you with a copy of the "Package Insert" which lists all relevant information