Yes, you should continue to receive your antidepressants in the hospital. Most medications including antidepressants need to be taken on a daily basis. Your depression doesn't stop because you are undergoing surgery and could potentially worsen given the stress and circumstance of surgery. The hospital should reconcile (review and determine the need to continue or stop medicines) on your admission. Sometimes medications need to be stopped during the time around surgery, but these are usually specific medications such as anticoagulants (blood thinners) or immune system suppressors because these medications could produce a bad outcome for you when taken prior to undergoing surgery.