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Hello I believe I may be able to help you with your concern. I am so sorry that you are experiencing this increase in symptoms related to your increase of the Venlafaxine. There are two possibilities here…1) The Venlafaxine may be a bad antidepressant for you because that medication increases Norepinephrine (adrenaline), which can increase anxiety, agitation, and insomnia
for people that are sensitive to it. So when your doctor increased your Venlafaxine, this most likely caused the increase in Norepinephrine which could have increased your anxiety. If is the case than switching to a SSRI antidepressant would help alleviate the symptoms you are experiencing. SSRI antidepressants are routinely used to treat anxiety, especially those that are sensitive to norepinephrine increases. 2)The other possibility is that you may have an underlying Bipolar
Disorder and switching to a mood stabilizer would be more effective for you since individuals who have an underlying Bipolar Disorder will go into a Manic episode when treated solely with an antidepressant. At this point it would be jumping to conclusions to suggest Bipolar Disorder since you already had anxiety issues before hand, so most likely the Venlafaxine’s Norepinephrine increase caused your symptoms unfortunately.
I hope this answers your questions and gives you some guidance on this issue. I truly wish you all the best with your continued treatment. Please let me know if you have any questions or concerns as I am happy to assist and support you regarding this issue.
If you are satisfied with my answer, I would truly appreciate it if you can take the time and provide me with a positive rating so that I can receive credit for helping you. Thank you