The signs and symptoms of a panic attack develop abruptly and usually reach their peak within 10 minutes. They rarely last more than an hour, with most ending within 20 to 30 minutes. Panic attacks can happen anywhere and at any time. You may have one while you’re in a store shopping, walking down the street, driving in your car, or even sitting on the couch at home.
Although many people breathe into a paper bag in an attempt to alleviate the hyperventilation that can be associated with panic, the benefit received may be the result of the individual thinking it will help (a placebo effect). Unfortunately, breathing into a paper bag while having trouble breathing can worsen symptoms when the hyperventilation is caused by a condition associated with oxygen deprivation, like an asthma attack or a heart attack.
Antidepressants are medications used to treat symptoms of depression but can also used to treat anxiety symptoms as well. In particular, selective serotonin reuptake inhibitors (SSRIs) and selective norepinephrine reuptake inhibitors (SNRIs) are the primary class of antidepressant used to treat anxiety. SSRIs commonly used to treat anxiety are escitalopram (Lexapro) and paroxetine (Paxil, Pexeva). SNRI medications used to treat anxiety include duloxetine (Cymbalta), venlafaxine (Effexor XR).
Furthermore, certain organic diseases may present with anxiety or symptoms that mimic anxiety. These disorders include certain endocrine diseases (hypo- and hyperthyroidism, hyperprolactinemia), metabolic disorders (diabetes), deficiency states (low levels of vitamin D, B2, B12, folic acid), gastrointestinal diseases (celiac disease, non-celiac gluten sensitivity, inflammatory bowel disease), heart diseases, blood diseases (anemia), cerebral vascular accidents (transient ischemic attack, stroke), and brain degenerative diseases (Parkinson's disease, dementia, multiple sclerosis, Huntington's disease), among others.