Hello: My son age 36 has been taking Effexor/Venafexaline for at least 10 years now. He is classified as having a disability, he has anxiety, panic attacks, OCD, and depression. He has actually been ill since the age of 15. We believe due to concussions playing hockey, this is when it all began for him, he had a personality change around 15 years. My question is, is it in his best interest to continue with this drug after so many years. He has been on numerous drugs but this one the longest. He is showing signs of increased anxiety and panic. Thank You-. Linda