Can lexapro (escitalopram) cause lasting jaw pain? i had a bad reaction to my first and only dose a week ago which included jaw quivering and my jaw has hurt since.

SSRIs and clenching: SSRI's SNRI's take some time for the body to acclimate. Generally, your MD starts you at a low dose and works you up to a therapeutic dose. Some side effects can be nervousness and jaw clenching. One possibility is that this has created a spasm in the muscles that close the jaw. Check with your MD about side effects and have your dentist examine you if jaw pain persists.