insidious weight gain - started taking Zoloft in 1997 (7 years a...

insidious weight gain - started taking Zoloft in 1997 (7 years ago) - weighed 123 lbs. Now 7 years later I weigh 143 pounds. It happened approximately every time I increased the dosage - 25, 50, 75. 100. 150, 200 mg - weight jumped to 128, 132, 135, 138, 140, 143. I'm 53 so I keep thinking it's menopause, but I think it's really the Zoloft. On 200 mg of Zoloft, who CARES about gaining weight??? After the last dosage increase (150 to 200), I stopped feeling compelled to exercise (jogging, treadmill) - and thus gained the last bunch of pounds. Am going off Z. soon, will try just Wellbutrin. I can't WAIT.