I was prescribed Citalopram HBR 20 mg and lorazepam 0.5mg for two weeks.. I have never taken any drugs before, and yesterday for the first time I took these medicines. Today when I woke up, I was restless, dizzy and felt like vomiting.. I was so irritable and did not know what to do. I guess I was having anxiety.. The doctor had told me that the meds might show some side effects for a couple of days.. I was ok once I stood under shower, and let myself cool down. Are the dosage prescribed for me normal? I am afraid if I get addicted to them, because my doctor has asked me to return after two weeks. Will I stop functioning if I don't take these medicines in the future?