Citalopram (Celexa)

Has anyone ever used this a d what symptoms have you experienced? I took one dose and I seemed to experience every bad side effect known to go with it, heart racing, panic attack, shakes, dizziness, feeling drunk, jaw clenching, headache, bleeding sore gums and insomnia, I didn't take my second dose out of pure fear from these side effects so I'm curious what other people have experienced themselves.