s as long as it can take before you can really assess its
effectiveness. The switch your doc made for you is quite common, a lot of times, rather than trying another med in the same class of meds (ie another SSRI, like Zoloft/Prozac/Lexapro), they decide to try a med in a different class, as in your case. Doctors usually take into consideration your symptoms, medical history, any other concurrent conditions or meds you may be taking to decide what the next step will be.