Tapering off Medicine. Lifetime?

Hello Doc, I have been suffering from anxiety since last one and half year now. I have had terrible anxiety and physical symptoms like choking , shortness of breath , rapid shallow breathing , lump in the throat feeling , etc. I consulted one of the best psychiatrists and i am going with his treatment since last one year. I have started feeling better since February this year. So , my question to him was can we taper off medicine as i am feeling ok now. Also , i have gained 7 kgs in the 3 months time span. My current weight is 95 kgs. He suggested - just because of this weight gain , he cannot taper off. He said - you need to be asymptomatic for a longer period of time otherwise the anxiety can come back or the symptoms can come back. So here , my question is - Till when will I be on anti depressants?? Lifetime? My medicines are as follows: Druthip 75 MG - One after dinner and Depsival Forte - One after dinner. please help suggest.