Xanax Bars

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Features & Compatibility

Xanax is a brand-name prescription medication. It’s FDA-approved to treat the following anxiety disorders in adults xanax bar.

  • generalized anxiety disorder
  • panic disorder, with or without agoraphobia (fear of being in places where it may be hard to leave)

Drug details

Xanax is a type of drug called a benzodiazepine, and it contains the active drug alprazolam.

Xanax comes as an oral tablet. It’s available in four strengths: 0.25 milligrams (mg),xanax bar 0.5 mg, 1 mg, and xanax bar 2 mg.

Is Xanax a controlled substance?

Yes, Xanax is classified as a Schedule IV controlled substance. This means the medication has an accepted medical use, but it also has a risk of misuse and dependence.*

With misuse, a drug is taken for a purpose or in a way that a doctor has not prescribed. Misuse can lead to addiction, which is when you’re unable to stop taking a drug, even though it may be causing harm. With dependence, your body becomes reliant on a drug to function as usual. Dependence can lead to withdrawal symptoms if you suddenly stop taking a drug.

There are special rules around prescribing and supplying Schedule IV controlled drugs. Your doctor or pharmacist can tell you more about this.

* Xanax has boxed warnings from the Food and Drug Administration (FDA) for the risk of misuse and addiction and the risk of dependence and withdrawal. A boxed warning is the most serious warning from the FDA. To learn more, see the “Xanax misuse and addiction” and “Xanax dependence and withdrawal” sections below.

Xanax vs. Xanax XR

Another form of Xanax is available. It’s called Xanax XR, and it’s approved to treat only panic disorder.

Xanax tablets are immediate-release, which means all the medication is released as soon as the tablet dissolves. Xanax XR tablets are extended-release (XR). This means the drug is released slowly over time.

To treat panic disorder, you’ll likely take Xanax three times per day. Xanax XR works over about 24 hours, so you’ll likely take a dose once per day. Your doctor may prescribe Xanax XR if once-daily dosing is more convenient for you. They may also prescribe this form if your panic disorder symptoms come back or worsen between doses of immediate-release Xanax.

This article focuses just on Xanax. To learn more about Xanax XR, talk with your doctor.


For information about the effectiveness of Xanax, see the “Xanax uses” section below.

Xanax side effects

Xanax can cause mild or serious side effects. The following lists contain some of the key side effects that may occur while taking Xanax. These lists do not include all possible side effects.

For more information about the possible side effects of Xanax, talk with your doctor or pharmacist. They can give you tips on how to manage any side effects that may concern or bother you.

Note: The Food and Drug Administration (FDA) tracks side effects of drugs it has approved. If you would like to notify the FDA about a side effect you’ve had with Xanax, you can do so through MedWatch.


Allergic reaction

As with most drugs, some people can have an allergic reaction after taking Xanax. This side effect was not reported in clinical trials of this drug but has occurred since the drug was approved.

Symptoms of a mild allergic reaction can include:

  • skin rash
  • itchiness
  • flushing

A more severe allergic reaction is rare but possible. Symptoms of a severe allergic reaction can include:

  • swelling under your skin, typically in your eyelids, lips, hands, or feet
  • swelling of your tongue, mouth, or throat
  • trouble breathing

Call your doctor right away if you have an allergic reaction to Xanax, as the reaction could become severe. Call 911 or your local emergency number if your symptoms feel life threatening or if you think you’re having a medical emergency.

Xanax dosage

The Xanax dosage your doctor prescribes will depend on several factors. These include:

  • the condition you’re taking Xanax to treat and its severity
  • your age
  • the form of Xanax you take*
  • your liver function
  • other medical conditions you may have
  • other medications you may take
  • side effects you may have with Xanax

Xanax doses are not determined by weight.

Typically, your doctor will start you on a low dosage. Then they’ll adjust it over time to reach the amount that’s right for you. Your doctor will ultimately prescribe the smallest dosage that provides the desired effect.

The following information describes dosages that are commonly used or recommended. However, be sure to take the dosage your doctor prescribes for you. Your doctor will determine the best dosage to fit your needs.

For more details on the dosage of Xanax, see this article.

* Xanax also comes in a form called Xanax XR. To learn more, see the “What is Xanax?” section above.

Xanax form and strengths (0.25 mg, 0.5 mg, 1 mg, and 2 mg)

Xanax comes as an oral tablet that’s available in four strengths: 0.25 milligrams (mg), 0.5 mg, 1 mg, and 2 mg.

Xanax tablet colors: White, peach, or blue

The color and shape of Xanax tablets vary by strength:

  • 0.25 mg: white, oval
  • 0.5 mg: peach, oval
  • 1 mg: blue, oval
  • 2 mg: white, rectangle with rounded corners

Xanax also comes as a long-acting form called Xanax XR (extended-release). Xanax XR tablets come in the following strengths, colors, and shapes:

  • 0.5 mg: white, pentagon
  • 1 mg: yellow, square
  • 2 mg: blue, round
  • 3 mg: green, triangle

To learn more about dosages of Xanax XR, talk with your doctor.

Dosage for generalized anxiety disorder

To treat generalized anxiety disorder (GAD) in adults, the typical starting dosage of Xanax is 0.25 mg to 0.5 mg, three times per day.

It’s possible that your doctor will adjust your dose every 3 to 4 days until you’re taking the dose that’s right for you. This depends on how you respond to the starting dosage.

The maximum recommended dosage for GAD is 4 mg per day, split into three doses.

Dosage for panic disorder

To treat panic disorder in adults, the recommended starting dosage of Xanax is 0.5 mg three times per day.

It’s possible that your doctor will adjust your dose every 3 to 4 days until you’re taking the dose that’s right for you. This depends on how you respond to the starting dosage. Your dose should be increased by no more than 1 mg per day.

The average dosage for panic disorder is 5 mg to 6 mg per day, split into three doses. However, some people may need up to 10 mg per day, split into three doses.

Additional information


0.25mg, 0.5mg, 1mg, 2mg


50Pills, 100 Pills

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