Genetics and family history (e.g., parental anxiety) may predispose an individual for an increased risk of an anxiety disorder, but generally external stimuli will trigger its onset or exacerbation. Genetic differences account for about 43% of variance in panic disorder and 28% in generalized anxiety disorder. Although single genes are neither necessary nor sufficient for anxiety by themselves, several gene polymorphisms have been found to correlate with anxiety: PLXNA2, SERT, CRH, COMT and BDNF. Several of these genes influence neurotransmitters (such as serotonin and norepinephrine) and hormones (such as cortisol) which are implicated in anxiety. The epigenetic signature of at least one of these genes BDNF has also been associated with anxiety and specific patterns of neural activity.
Some medical conditions, like thyroid abnormalities and anemia, as well as certain medications, can produce severe anxiety. Examples of such medications include stimulants like methylphenidate (Ritalin) or amphetamine salts (Adderall), diabetes medications like metformin (Glucophage) and insulin, antimalarial medications like quinine, as well as corticosteroid withdrawal, such as withdrawal from dexamethasone (Decadron). As individuals with panic disorder seem to be at higher risk of having a heart valve abnormality called mitral valve prolapse (MVP), this possibility should be investigated by a doctor since MVP may dictate the need for special precautions when the individual is being treated for any dental problem. While the development of panic attacks has been attributed to the use of food additives like aspartame, alone or in combination with food dyes, more research is needed to better understand the role such substances may have on this disorder.
As is true for other mood and anxiety disorders, the use of Selective Serotonin Reuptake Inhibitors (SSRI's; e.g.., Paxil, Prozac, Zoloft), Benzodiazepines (e.g., Xanax, Lorazepam), and Selective Norepinephrine Reuptake Inhibitors (SNRI's; e.g., Cymbalta, Effexor, Pristiq) are common medical treatments for panic disorder. Additionally, D-cycloserine is a medication that is now being explored as a way to enhance effects of CBT (e.g., Hofmann et al., 2013). These medications may have side effects and taking them can lead to tolerance, withdrawal symptoms, and dependence, so it is important that you consult with a physician before starting or stopping these medications. There is evidence that taking one of these medications in addition to receiving behavioral therapy (e.g., CBT) can significantly benefit patients with panic disorder, although seeking psychotherapy in itself is largely effective (Arch et al., 2017).
We all tend to avoid certain things or situations that make us uncomfortable or even fearful. But for someone with a phobia, certain places, events or objects create powerful reactions of strong, irrational fear. Most people with specific phobias have several things that can trigger those reactions; to avoid panic, they will work hard to avoid their triggers. Depending on the type and number of triggers, attempts to control fear can take over a person’s life.
People with generalized anxiety disorder (GAD) display excessive anxiety or worry, most days for at least 6 months, about a number of things such as personal health, work, social interactions, and everyday routine life circumstances. The fear and anxiety can cause significant problems in areas of their life, such as social interactions, school, and work.