The medication induced changes in your metabolism and caused weight gain. Even if you are off the drug, your metabolism still need to adapt to a drug free system. This can be slow, and losing weight can be harder than gaining weight for certain individual.
Your condition is not permanent, the change in your metabolism is temporary unless you're at an age that would suggest a slower metabolism.
You should be careful with your calorie intakes, exercise and I think you will be doing just fine and your metabolism will return to normal and you will eventually lose weight.
M4
I had been on Cipralex for 2 years and never experienced any weight gain...the drug also made me sick when i stopped it and went back on it so my family doctor put me on zoloft. I hope you can find the answers your looking for! good luck!