Discontinuation : Stopping Effexor (venlafaxine) abruptly can cause many physical symptoms and is rarely recommended. Go to www. Effexor (venlafaxine). Com to read about the symptoms. I don't quite understand what you mean by swelling in your neck. If that is a separate issue, you may need to see your doctor for further evaluation of that. It could be tight muscles from suddenly stopping an anti anxiety med which Effexor (venlafaxine) is also.
Answered 6/25/2014
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