I took zoloft (sertraline) for 15years it stopped working i take 20mgescitalopram for 6 months still having anxiety would it be safe to go back to zoloft (sertraline)?

Please discuss: this choice with your physician/ psychiatrist. Don't know what your previous dose of zoloft was. Sometimes increasing the dose will do the trick when it doesn't seem as effective over time. Likewise- don't know your dose for lexapro (escitalopram) - raising that dose may be an option as well. Going back to zoloft may be an option for you. Take care.