<s>[INST] I am on Selexa 30 mg but asked my doctor if there was something that might help me focus ... have started a new job and feel anxious ... he prescribed Effexor but I do not want to switch if this will not make a significant difference. I have been through lots of loss lately ... [/INST] Hi and thanks for the query,It is important to note that people react or respond differently to different drugs, especially drugs acting on the nervous system. Switching could be justified in case Selexa remains ineffective even at a maximal dose. Kind regards </s>