The views expressed by me are for educational purposes only and do not establish a doctor patient relationship.
This is Dr. D.J., experienced Internal Medicine Specialist.
I am here to address your concerns and provide great service.
For panic attacks, it is better to consider paroxetine ( Paxil) if never tried before.
Lexapro and Paxil belong to same class and can be switched easily.
Hence, this is an option for you to switch to paxil.
Another option will be to increase the dose of klonopin if possible max 3-4 mg daily.
Please also get checked for thyroid disorder --hypothyroidism is one possible medical cause.
Iron deficiency also can cause psychological symptoms.
Serum TSH, ferritin levels should be checked.