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Generalized Anxiety Disorder Medications

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7.22.2017 | Connor Adamson
Alprazolam for anxiety
Generalized Anxiety Disorder Medications

There have been many concerns about SSRIs and increased risk for suicidal behavior. Concern is greatest for children, but both adults and children who are treated with SSRIs should be carefully monitored for any worsening of depressive symptoms or changes in behavior. This is especially important during the first few months of antidepressant treatment.

Tricyclic Antidepressants. Tricyclics are an older type of antidepressant. Tricyclics used for treatment of anxiety disorder include imipramine (Tofranil, for generalized anxiety disorder, panic disorder), nortriptyline (Pamelor, for panic disorder), desipramine (Norpramin, for panic disorder), and clomipramine (Anafranil, for obsessive compulsive disorder). Clomipramine is approved specifically for OCD, but because of its severe side effects it is usually used only if SSRIs have failed to help.

Withdrawal and its Treatments. Withdrawal symptoms can be very severe, even in people who rapidly discontinue benzodiazepines after taking them for only 4 weeks. Symptoms include sleep disturbance and anxiety, which can develop within hours or days after stopping the medication. Some patients experience stomach distress, sweating, and insomnia, which can last 1 - 3 weeks. The longer the drugs are taken and the higher their dose, the more severe these symptoms can become. Tapering off gradually is the best approach to stop taking these drugs. Certain medications (such as anti-seizure drugs, antidepressants, and buspirone) may also help with withdrawal.

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Benzodiazepines can have many side effects, generally associated with chronic use. The most common are daytime drowsiness and a hung-over feeling. In rare cases, they can cause agitation. They may worsen respiratory problems. Benzodiazepines are potentially dangerous when used in combination with alcohol. Overdoses can be serious, although they are very rarely fatal.

Selective serotonin-reuptake inhibitors (SSRIs), or the serotonin-norepinephrine reuptake inhibitor (SNRI) venlaine (Effexor), are the primary first-line treatment for anxiety disorders. For patients who are not helped by these drugs or who need help rapidly, benzodiazepines may be prescribed, either alone or in combination with an antidepressant. Other types of antidepressants, including tricyclic antidepressants, may also be used to treat patients with severe or chronic forms of anxiety disorders.

Azapirones, such as buspirone (BuSpar), act on serotonin receptors called 5-HT(1A). Buspirone appears to work as well as a benzodiazepine for treating generalized anxiety disorder. It usually takes several days to weeks for the drug to be fully effective. It is not useful against panic attacks.

Paroxetine has been linked to heart-related birth defects when women took this drug during the first trimester of pregnancy. It should not be taken by women who are pregnant or planning on becoming pregnant. Other SSRIs are generally considered safe for use during pregnancy and breastfeeding. Still, women who are pregnant or who are considering becoming pregnant should discuss the potential risks of these drugs with their doctors.

Pregabalin (Lyrica) and gabapentin (Neurontin) are drugs used to treat seizures and other conditions. Researchers are investigating whether these drugs may be useful for certain anxiety disorders, such as social anxiety disorder and general anxiety disorder. Their exact role in the treatment of anxiety disorders is not clear, however.

Loss of Effectiveness and Dependence. Eventually these drugs can lose their effectiveness with continued use at the same dosage. As a result, patients may want to increase their dosage to prevent anxiety. This causes dependency, which can occur after taking these drugs for several weeks.

Benzodiazepines are effective medications for most anxiety disorders and have been the standard of treatment for years. However, their longterm daily use has been associated with a risk for dependency and abuse. Therefore, they have been supplanted in most cases by SSRIs and other newer antidepressants. For anxiety disorders, benzodiazepines are most often used to treat panic disorder, and are sometimes used for social anxiety disorder and generalized anxiety disorder. These drugs include alprazolam (Xanax), clonazepam (Klonopin), and lorazepam (Ativan).

Serotonin-norepinephrine reuptake inhibitors (SNRIs). SNRIs are known as dual inhibitors because they work on two neurotransmitters -- norepinephrine and serotonin. Venlaine (Effexor) is an SNRI that is approved for treatment of generalized anxiety disorder, social anxiety disorder, and panic disorder in adults. (It is not approved for children.) As with many SSRIs, venlaine impairs sexual function. Venlaine can increase blood pressure and heart rate and should be used with caution in patients with high blood pressure or heart disease. Some patients report severe withdrawal symptoms, including dizziness and nausea. This drug has a serious risk for overdose. Venlaine should not be taken during the last trimester of pregnancy because the drug can cause complications in newborn infants.

Duloxetine (Cymbalta) also acts on both serotonin and norepinephrine. It is approved for treatment of generalized anxiety disorder. Side effects are generally mild and include dry mouth, nausea, and sleepiness. Patients with narrow-angle glaucoma or patients with liver or kidney diseases should not take duloxetine. Because duloxetine can cause liver damage, patients who drink large quantities of alcoholic beverages should not take it.

Beta blockers, including propranolol (Inderal) and atenolol (Tenormin), block the nerves that stimulate the heart to beat faster. They affect only the physiologic symptoms of anxiety (particularly rapid heart rate) and are most helpful for phobias, particularly performance anxiety. They may be taken before entering a situation where anxiety symptoms tend to occur. Beta blockers are less effective for other forms of anxiety.

Buspirone does not produce any immediate euphoria or change in sensation, so some people believe, erroneously, that the drug doesn't work. Such qualities result in a very low potential for abuse. Unlike the benzodiazepines, buspirone is not addictive, even with long-term use, so it may be particularly useful for the patient whose anxiety disorder coexists with alcoholism or drug abuse.

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Buspirone tends to have less pronounced side effects than benzodiazepines and no withdrawal effects, even when the drug is discontinued quickly. Common side effects include dizziness, drowsiness, and nausea. Buspirone should not be used with monoamine oxidase inhibitors (MAOIs).

Atypical antipsychotics are mostly used for treating schizophrenia, bipolar disorder, and major depressive disorder. Doctors sometimes use the atypical antipsychotic olanzapine (Zyprexa) for treating severe cases of post-traumatic stress disorder. However, olanzapine has severe side effects, including weight gain and increased high blood sugar levels, which can increase the risk for diabetes.

Mitrazapine (Remeron) is another type of SNRI that is sometimes used for treatment of post-traumatic stress disorder and social anxiety disorder.

Selective Serotonin Reuptake Inhibitors (SSRIs). SSRIs include fluoxetine (Prozac), sertraline (Zoloft), paroxetine (Paxil), fluvoxamine (Luvox), citalopram (Celexa), and escitalopram (Lexapro).

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SSRIs can cause agitation, nausea, and diarrhea. Sexual function side effects include low sex drive, inability to have an orgasm, and impotence. Over time, many SSRI-treated patients gain weight, although the degree of weight gain varies depending on the drug. Elderly people taking these drugs should take the lowest effective dose possible, and those with heart problems should be monitored closely.

Side effects of TCAs include sleep disturbance, abrupt reduction in blood pressure upon standing, weight gain, sexual dysfunction, and mental disturbance. Elderly patients and those with a history of seizures, cardiac problems, closed-angle glaucoma, and urinary retention or obstruction should be closely supervised when taking tricyclics.

Drug therapies for anxiety disorders work best in combination with cognitive behavioral therapy or some other forms of psychotherapy.

The elderly are more susceptible to side effects and should usually start at half the dose prescribed for younger people. These drugs increase the risk of falling, which can increase the risk for hip fracture in older people. Also of concern are studies showing a high risk of automobile accidents in people who take benzodiazepines. Benzodiazepines taken during pregnancy are associated with birth defects (such as cleft palate), and they should not be used by pregnant women or by nursing mothers.

Alprazolam for anxiety