I am 48 years old and on 200mg of Zoloft daily and I get dizzy when I move quickly or stop abruptly when running or playing sports. This does not happen when I go for a jog for a few miles or so, but only when I move quickly. This has been happening ever since I had a panic attack 18 months ago and was put on the Zoloft. The Zoloft has helped with panic, but these dizzy symptoms will not go away. Does anyone else have any experience with these symptoms or have any advice?