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Xanax (Alprazolam) vs Ativan (Lorazepam)

Dena Westphalen
Author:
Dena Westphalen
PharmD
Dr. Henry Bradford
Medical Reviewer:
Dr. Henry Bradford
MD
The medications listed on this website are provided for informational purposes only.

Their inclusion does not guarantee they will be prescribed to any individual, as treatment decisions are ultimately at the discretion of healthcare providers. Healthcare providers may prescribe other medications or recommend non-pharmacological treatment based on the patient’s unique health circumstances and needs. Read more

Xanax[1] and Ativan[2] have a boxed warning, the most serious type of warning from the Food and Drug Administration (FDA). Xanax’s active ingredient, alprazolam, and Ativan’s active ingredient, lorazepam, have an increased risk of abuse, misuse, addiction, dependence, withdrawal reactions, and even death. Concomitant use of Xanax or Ativan and opioids poses a danger. Xanax and Ativan are also controlled substances, indicating their high potential for misuse or dependence. Specific federal and state laws limit the amount of these medications that can be prescribed or dispensed within a certain period of time.

Highlights

  • Although both Xanax (alprazolam) and Ativan (lorazepam) are benzodiazepines, they are unique medications and last for different amounts of time in the body. 
  • Both medications are intended for short-term use. Using either medication long-term has a risk of physical dependence and an increased risk of withdrawal symptoms.
  • There are many considerations to choose between Xanax and Ativan, including your specific symptoms, age, and other existing medical conditions.

Xanax and Ativan are often considered for short-term treatment of anxiety. They both cause you to feel relaxed by working on certain neurotransmitters in the brain. This guide comparing Xanax and Ativan will help you understand the similarities and differences between the two medications.

Get your individualized anxiety treatment plan from a licensed provider within 24 hours.

What Are Ativan and Xanax?

Ativan (lorazepam) and Xanax (alprazolam) are prescription medications known as benzodiazepines[3] . They work in the brain by affecting the gamma-aminobutyric acid (GABA) receptors, which causes your nervous system to slow down so you feel calm and relaxed. Since these medications have similar effects and belong to the same class, it is common for healthcare providers to consider Ativan or Xanax as a potential treatment for anxiety.

When to Use Ativan or Xanax

Ativan is FDA-approved for generalized anxiety disorder (GAD) and short-term treatment of anxiety-induced insomnia. It is also used in hospitals to reduce pre-surgery anxiety and to induce sedation.

Xanax is FDA-approved to treat panic disorder and other anxiety disorders and may be prescribed off-label for insomnia. It is often chosen for its relatively rapid onset of action, which allows it to work quickly to treat anxiety symptoms.

When comparing Ativan vs Xanax, or lorazepam vs alprazolam as generics, healthcare providers often will consider the type of anxiety you have. Ativan is often preferred for treating generalized anxiety disorder (GAD) as it lasts a little longer in the body.

Since Xanax tends to work more quickly than Ativan, it’s often used when the treatment of acute symptoms is needed, such as in panic disorder. However, the specific choice of using either medication depends on a number of factors and should be determined by working with your healthcare provider. 

 

Ativan

Xanax

Generic name

Lorazepam

Alprazolam

Drug class

Benzodiazepine

Benzodiazepine

Potential Uses

Generalized anxiety disorder (GAD), anxiety-induced insomnia

Panic disorder and other anxiety disorders

Common Side effects

Drowsiness and fatigue, dizziness, loss of coordination, nausea and constipation, changes in appetite

Drowsiness and fatigue, dizziness, lack of coordination, gastrointestinal issues

"Xanax and Ativan fundamentally share the same mechanism of action — they enhance the effects of GABA within the central nervous system. However, they differ in their pharmacokinetic profiles. Xanax generally has a faster onset and shorter duration of action compared to lorazepam. This may make Xanax more useful for sudden or acute panic symptoms, whereas lorazepam’s somewhat longer duration may be better suited for anxiety episodes that persist for several hours. "
Dr. Henry Bradford, MD
Medical provider at MEDvidi

Ativan vs Xanax Dosage

The dosage of Ativan or Xanax may differ based on the particular condition being treated, the severity of symptoms, health history, and individual response to treatment. The starting dose for Ativan is often 0.5 mg, and 0.25 mg for Xanax. However, note that dosages may vary based on the individual. It’s important to follow your healthcare provider’s instructions on how to take Ativan or Xanax. 

Both Ativan and Xanax should only be used short-term. Taking them long-term can increase your risk of dependency or withdrawal symptoms. Additionally, they might interact with other medications, so it’s important to tell your healthcare provider about all medicines and supplements you are taking.

Connect with a licensed healthcare professional online to find out what treatment for anxiety can help you best.

Xanax vs Ativan: Key Differences

Though both Ativan and Xanax are benzodiazepines, they have significant differences in their onset of action, duration of effect, and potential uses.

Onset and Duration of Action

One of the main differences between Ativan and Xanax is how fast they start to work in the body and their duration of action, or how long they continue working.

Xanax starts working faster than Ativan. It typically starts to work within minutes of taking the dose, which makes it a suitable choice for acute anxiety and panic attacks. The effects of Xanax usually wear off within 1-2 hours. The timeline is approximate; never increase the prescribed dosage if you don’t see the effects right away.

Ativan usually starts to work between 15 and 30 minutes after taking the dose, and the effects can last a little longer, for up to 4 to 6 hours. The extended effects of Ativan may make it a suitable choice for addressing some long-lasting symptoms of anxiety. 

Uses

Both Xanax and Ativan work as treatments for anxiety. Xanax may be chosen for symptoms that need a quicker solution, while Ativan may be used when there are symptoms that need a treatment that lasts longer. 

Half-life of Xanax vs Ativan

The half-life measures how long it takes for half of a medication to be excreted from your body. This directly relates to how long any medication lasts in your body (the duration of action). The half-life of Xanax is from 11 to 16 hours. In contrast, Ativan has a somewhat longer half-life of 12 to 20 hours. This means that Ativan will last longer in the body.

Xanax vs Ativan: Similarities

Xanax and Ativan are very similar medications and are both used for anxiety and panic disorders. Keep reading to learn about the similarities of these medications in further detail. 

Drug Class

Both Xanax and Ativan are benzodiazepines and work by enhancing the effects of gamma-aminobutyric acid (GABA) in the brain. GABA[4] is a neurotransmitter that plays a role in regulating anxiety and causes someone to feel calmer, which can contribute to reducing the symptoms of anxiety and panic disorder.

Uses

Xanax and Ativan are both used to treat anxiety and panic disorders. Xanax is also sometimes used off-label to treat insomnia. Both medications are only intended to be used short-term since using them long-term can increase the risk of dependence and withdrawal effects. 

Common Side Effects

All medications, including Xanax and Ativan, can cause side effects. It’s important to tell your healthcare provider about any side effects you experience. Common side effects of both Xanax and Ativan include:

  • Drowsiness or fatigue
  • Dizziness
  • Impaired or loss of coordination
  • Nausea or vomiting
  • Changes in appetite

Serious side effects can also include confusion, changes in mood, difficulty speaking, or disorientation. 

These are not comprehensive lists of side effects. Be sure to chat with your prescriber about what side effects to expect or to watch for with any new medication. 

Sedative Effect

Ativan and Xanax can both cause sedation or drowsiness. They can also both impact coordination. It’s important not to drive or operate heavy machinery until you know how either medication impacts you. 

Drug Interactions

Xanax and Ativan have overlapping drug reactions since they are both benzodiazepines. It’s important to tell your provider about every over-the-counter or prescription medication, herbs, or supplements you take. Many interactions with benzodiazepines can be dangerous and possibly even life-threatening. Examples of these dangerous interactions include:

  • Opioids[5] (pain medications)
  • Alcohol and other CNS depressants[6]
  • Sedating[7] medications
  • Antipsychotics[8]
  • Antifungal medications
  • Antidepressants
"Combining benzodiazepines such as Xanax or Ativan with alcohol, opioids, or other central nervous system depressants can be dangerous and potentially life-threatening. These combinations may intensify sedation and respiratory depression, increasing the risk of overdose or death. Patients should disclose all medications and substances they use with their healthcare provider for safety. "
Dr. Henry Bradford, MD
Medical provider at MEDvidi
Schedule a virtual appointment and receive personalized treatment for anxiety.

Precautions and Warnings

Xanax and Ativan may not be safe for certain people to take. This is not a comprehensive list but certain precautions and warnings include: 

  • Dependency and Addiction. Long-term use of Ativan or Xanax can result in physical and psychological dependence or addiction. Abrupt discontinuation of these medications may also cause withdrawal symptoms like agitation, sleep disturbances, and, in extreme situations, seizures.
  • Respiratory or Breathing Problems. Xanax and Ativan can both cause respiratory depression and should be administered cautiously to patients with respiratory disorders, such as chronic obstructive pulmonary disease (COPD), asthma, or those who take medications with similar risk of respiratory depression.
  • Liver Problems: Ativan is usually preferred over Xanax when someone has liver problems.
  • Pregnancy and Breastfeeding: It is recommended to avoid using any benzodiazepines, including Ativan and Xanax, during pregnancy or breastfeeding. This is because the medications can be passed along to an infant and cause dangerous side effects like sedation, respiratory depression, or withdrawal in the infant. 
  • Older Adults: Lower doses are usually used in older adults since there is a much higher risk of confusion, memory loss, and dangerous falls in this population.*

*Ativan is usually preferred for older adults, since they commonly have decreased liver function. Ativan is metabolized differently from Xanax and is not metabolized as heavily in the liver, which may make it a better choice.

Ativan vs Xanax: Which Medication Is More Effective for the Treatment of Anxiety?

Both medications can be highly effective treatments for anxiety. Choosing a specific medication is a very individual decision and depends on a number of factors. These can include the type of anxiety, the severity of symptoms, medical history, and how someone responds to the medication. 

Xanax tends to act faster and has a shorter duration of action, which may make it a better choice for acute or sudden episodes of anxiety and panic attacks. However, since it has a shorter duration of action, it may require more frequent dosing.

Ativan has a slightly longer onset but a longer duration of action. This means that it might be a better choice for managing persistent anxiety. Its longer half-life also means it may require less frequent dosing, which can be more convenient for some individuals. It is also often more effective in older adults since it can be used in people with certain liver issues.

Both Ativan and Xanax should only be used short-term. Taking them long-term can increase your risk of dependency or withdrawal symptoms. Additionally, they might interact with other medications, so it’s important to tell your healthcare provider about all medicines and supplements you are taking.

You should also discuss your long-term treatment approach with your healthcare provider. Benzodiazepines are usually only intended to be used for short-term treatment of anxiety. For long-term treatment, healthcare providers often recommend non-benzodiazepine options. These can include:

These types of medications can be helpful in the long term and do not have a risk of physical dependence and withdrawal. Cognitive-behavioral therapy (CBT) is also usually recommended to help identify the cause of anxiety symptoms and build a self-support system. 

In Conclusion

When considering the choice of Xanax versus Ativan, multiple factors may be considered to make the choice. These can include the available strengths of the medications, differences in how quickly they take to act or how long they last, and health history. 

Your healthcare provider will help to determine the right treatment for you. Book your video visit with a licensed healthcare professional to get your symptoms assessed and receive a personalized treatment plan for anxiety online.

FAQ

Converting an Ativan dosage to Xanax is not very clear. Roughly, 1 mg of Ativan would be converted to a 0.5 mg dose of Xanax, but this can vary for different individuals. Note that it’s important to stick to the medical provider’s instructions and take the prescribed medication. The change is possible only after a consultation with a healthcare professional.

Both medications are effective for treating anxiety. Generally, Xanax needs smaller dosages than Ativan to achieve effects, but this can vary from person to person, and neither medication is considered stronger than the other. 

Both Xanax (alprazolam) and Ativan (lorazepam) are benzodiazepines and can make you feel sleepy. Ativan is used more commonly for inducing sleep or reducing anxiety since it’s FDA-approved for insomnia treatment. However, Xanax can be prescribed for insomnia off-label, too.

Neither medication is recommended for use while pregnant. All benzodiazepines should be avoided while a patient is pregnant or breastfeeding. This is because they can cause dangerous side effects for the infant. If you’re pregnant or planning to become pregnant, you should discuss your anxiety treatment options with your healthcare provider.

If you’re currently using Ativan or Xanax and become pregnant, contact your healthcare provider immediately. Don’t stop taking your medication until you consult with them so they can ensure you stop taking the medication safely to avoid withdrawal symptoms. 

No, you should not combine Ativan or Xanax with alcohol. Both are benzodiazepines, which can be dangerous to take with alcohol. Both benzodiazepines and alcohol can cause respiratory depression and combining Ativan or Xanax with alcohol can intensify these effects and potentially result in severe and even life-threatening side effects, including:

  • Increased drowsiness, dizziness, and risk of falling or accidents
  • Severe confusion
  • Slowed or difficulty breathing

It’s possible to transition from Xanax to Ativan, but you should work with your healthcare provider to ensure this transition is safe and effective.

Lorazepam has a longer half-life and is usually longer-acting compared to alprazolam.

No, you cannot take Xanax and Ativan together. The medications work on the same receptors (GABA) in the brain, and taking them together can increase the risk of dangerous and even life-threatening side effects.

Sources

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8 sources
  1. DailyMed - ALPRAZOLAM tablet. Nih.gov. Published 2024.
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  2. DailyMed - ATIVAN- lorazepam tablet. Nih.gov. Published 2023.
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  3. Bounds CG, Patel P. Benzodiazepines. [Updated 2024 Jan 30]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2026 Jan
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  4. Gamma-Aminobutyric Acid (Gaba): Uses, Side Effects, Interactions, Dosage, and Warning.
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  5. National Institute on Drug Abuse. Opioids. National Institute on Drug Abuse. Published 2022.
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  6. Melinosky C. What to Know About CNS Depressants. WebMD. Published October 23, 2023.
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  7. Moniruzzaman M, Atikur Rahman M, Ferdous A. Evaluation of Sedative and Hypnotic Activity of Ethanolic Extract of Scoparia dulcis Linn. Evid Based Complement Alternat Med. 2015
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  8. Chokhawala KP, Stevens L. Antipsychotic Medications. [Updated 2023 Feb 26]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2026 Jan
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Dena Westphalen
Author:
Dena Westphalen
PharmD
Dr. Henry Bradford
Medical Reviewer:
Dr. Henry Bradford
MD
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