Hi. It's terrific that you are examining patterns in your panic attacks. Noticing a pattern is an important step. That feeling of unreality and detachment from your body is called "derealization and depresonalization" and are common symptoms of panic attacks.
If you think medications could be affecting the pattern, why not ask your doctor for "a Medication Review?" This would be a specific and deliberate examination of what meds you're taking and when, and it should be done every couple of months.
And if you ask for it telling him/her that its purpose is to discuss and examine this pattern effect with you, your doctor will most likely do this, and yours may make an adjustment in a med in an effort to help.
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Anne-Marie, Site Administrator