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Klonopin vs. Xanax: Differences, similarities, and which is better for you

Drug overview & main differences | Conditions treated | Efficacy | Insurance coverage and cost comparison | Side effects | Drug interactions | Warnings | FAQ

Klonopin (clonazepam) and Xanax (alprazolam) are similar medications indicated to treat anxiety and panic disorders. Both medications are classified as benzodiazepines, which work by boosting the activity of GABA in the brain. GABA, or gaba-aminobutyric acid, is an inhibitory neurotransmitter that plays a major role in slowing down activity in the central nervous system (CNS).

Both Klonopin and Xanax help treat symptoms of anxiety by producing a relaxing and calming effect. However, they have notable differences in how long they work and other conditions they may be used for.

What are the main differences between Klonopin and Xanax?


Klonopin is the brand name for clonazepam. It is considered a long-acting benzodiazepine with a half-life of about 30 to 40 hours. Klonopin reaches maximum concentrations in the blood within one to four hours after taking it.

Klonopin is available as a generic tablet in strengths of 0.5 mg, 1 mg, and 2 mg. Orally disintegrating (ODT) tablets are also available in strengths of 0.125 mg, 0.25 mg, 0.5 mg, 1 mg, and 2 mg.


Xanax is commonly known by its generic name alprazolam. Unlike Klonopin, Xanax is a short-acting benzodiazepine with a half-life of around 11 hours. Peak blood concentrations are reached within one to two hours after administration.

Xanax comes in brand and generic tablets with strengths of 0.25 mg, 0.5 mg, 1 mg, and 2 mg. Extended-release tablets are also available in strengths of 0.5 mg, 1 mg, 2 mg, and 3 mg. For those who may have trouble swallowing tablets, alprazolam can be prescribed as an ODT tablet or liquid solution (Intensol).

Main differences between Klonopin and Xanax
Klonopin Xanax
Drug class Benzodiazepine
Brand/generic status Brand and generic version available Brand and generic version available
What is the generic name? Clonazepam Alprazolam
What form(s) does the drug come in? Oral tablet
Orally disintegrating tablet
Oral tablet
Orally disintegrating tablet
Extended-release tablet
What is the standard dosage? Panic Disorder:
Initially, 0.25 mg by mouth twice daily. After 3 days, dose may be increased by 0.125 mg to 0.25 mg twice daily every 3 days to a target dose of 1 mg per day.Seizures:
1.5 mg per day divided into 3 doses. Dose may be increased by 0.5 mg to 1 mg every 3 days to a maximum dose of 20 mg per day.
Panic Disorder:
Immediate-release or ODT tablets: 0.5 mg by mouth three times daily. Dose may be increased by up to 1 mg per day every 3 to 4 days to a range of 1 to 10 mg/day.Extended-release tablets:
0.5 mg to 1 mg by mouth once daily. Dose may be increased by up to 1 mg per day every 3 to 4 days to a range of 3 to 6 mg per day.
How long is the typical treatment? Duration of treatment is determined by your healthcare provider. Long-term use of benzodiazepines is not generally recommended. Duration of treatment is determined by your healthcare provider. Long-term use of benzodiazepines is not generally recommended.
Who typically uses the medication? Adults, 18 years of age and older
(Children with seizure disorder: up to 10 years of age or 65 lbs. of body weight)
Adults, 18 years of age and older

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Conditions treated by Klonopin and Xanax

As anxiolytic medications, Klonopin and Xanax can help relieve symptoms of anxiety and panic attacks. Klonopin and Xanax are both FDA approved to treat panic disorder in adults with or without agoraphobia.

Klonopin is also approved to treat seizure disorders in adults and children. It is often used alone or in combination with other treatments for Lennox-Gastaut syndrome, atonic seizures, and myoclonic seizures. Klonopin may also be used in those who experience absence seizures.

Xanax is approved for short-term relief in those with anxiety disorders. Anxiety disorders include generalized anxiety disorder and social phobia. According to its FDA label, Xanax can also treat anxiety that is accompanied by depression.

Off-label uses of Klonopin and Xanax include insomnia, essential tremor, premenstrual syndrome, and restless leg syndrome.

Condition Klonopin Xanax
Anxiety Yes Yes
Panic disorder Yes Yes
Seizure disorder Yes No
Insomnia Off-label Off-label
Essential tremor Off-label Off-label
Restless leg syndrome Off-label Off-label
Premenstrual syndrome Off-label Off-label

Is Klonopin or Xanax more effective?

Currently, there are no strong head-to-head studies that have compared Klonopin and Xanax. Both benzodiazepines are effective depending on how they’re used and what conditions they are treating.

Xanax is more effective in treating seizure disorders. It also has a longer duration of action, which may be preferable for some people.

Xanax may need to be taken more times per day in order to keep blood levels consistent. This could also increase the risk of withdrawal symptoms.

Since anxiety and depression often occur together, benzodiazepines can usually be prescribed in combination with an antidepressant. In one meta-analysis, those with general anxiety disorder (GAD) experienced increased benefits when starting on a benzodiazepine and antidepressant together, at least initially.

It’s important to understand that treatment with benzodiazepines is highly individualized. Consult your healthcare provider for medical advice on the best option for your mental health.

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Coverage and cost comparison of Klonopin vs. Xanax

Klonopin is a prescription drug that can be purchased in its generic or brand-name form. Generic Klonopin tablets are usually covered by Medicare and insurance plans. The average retail cost of generic Klonopin is typically around $45. Using a prescription discount card can lower the cash price to around $14 or less.

Xanax is also available in generic and brand-name tablets. For immediate-release generic Xanax tablets, the average retail price can be as high as $63. However, with a SingleCare discount card, the out-of-pocket costs can be reduced to less than $15 at certain pharmacies. The overall cost of your medication will vary based on your preferred pharmacy and how many tablets you are getting.

  Klonopin Xanax
Typically covered by insurance? Yes Yes
Typically covered by Medicare? Yes Yes
Standard dosage 1 mg tablets 1 mg tablets
Typical Medicare copay $0–$24 $0–$362
SingleCare cost $14-$16 $13-$23

Common side effects of Klonopin vs. Xanax

The most common side effects of Klonopin and Xanax include drowsiness and depression. Those who take Klonopin or Xanax can also experience fatigue, dizziness or lightheadedness, loss of coordination, and memory impairment. Dry mouth is also a common side effect associated with Klonopin and Xanax.

Serious side effects of benzodiazepines can include severe drowsiness, confusion, seizures, weakness, and trouble breathing. Serious side effects are more likely to occur in an overdose or when the drug is not taken as prescribed.

  Klonopin Xanax
Side effect Applicable? Frequency Applicable? Frequency
Drowsiness Yes 37% Yes 41%
Depression Yes 7% Yes 14%
Dizziness Yes 8% Yes 2%
Fatigue Yes 7% Yes >1%
Loss of coordination Yes 5% Yes >1%
Memory impairment Yes 4% Yes >1%
Dry mouth Yes *not reported Yes 15%

This may not be a complete list. Consult your doctor or pharmacist for possible side effects.
Source: DailyMed (Klonopin), DailyMed (Xanax)

Drug interactions of Klonopin vs. Xanax

Klonopin and Xanax are primarily metabolized, or processed, in the liver by the CYP3A4 enzyme. CYP3A4 inhibitors can increase blood levels of these benzodiazepines, which can result in increased adverse effects. CYP3A4 inhibitors include antifungals like ketoconazole as well as antibiotics like erythromycin.

CYP3A4 inducers can speed up the metabolism of Klonopin or Xanax and, ultimately, decrease their effectiveness. CYP3A4 inducers include anticonvulsant drugs like phenytoin and carbamazepine, among others.

Because Klonopin and Xanax have CNS depressant effects, they can interact with other drugs that have similar effects. Taking benzodiazepines with drugs such as opioids and tricyclic antidepressants can increase the risk of severe drowsiness, respiratory depression, and even death, especially in large doses.

Drug Drug class Klonopin Xanax
CYP3A4 inhibitors Yes Yes
CYP3A4 inducers Yes Yes
Opioids Yes Yes
Tricyclic antidepressants Yes Yes

This may not be a complete list of all possible drug interactions. Consult a doctor with all the medications you may be taking.

Warnings of Klonopin and Xanax

Both Klonopin and Xanax have warnings on their drug labels about using benzodiazepines with opioids. The combination of benzodiazepines and opioids can lead to sedation, very shallow breathing, coma, and death. For this reason, these drugs should not be taken together. If they must be taken together, their dosages should be monitored or adjusted to ensure safety.

Benzodiazepines—sometimes called “benzos”—are commonly abused. Those who have a history of substance abuse in the past may be at an increased risk of abuse and dependence with benzodiazepines. Klonopin and Xanax are Schedule IV drugs as classified by the DEA in the United States.

Benzodiazepines are intended for short-term use and should not be discontinued abruptly. Stopping these medications without tapering its doses can lead to withdrawal symptoms.

In severe cases, withdrawal symptoms can be life-threatening and include rebound anxiety, insomnia, and seizures. Because of the short-acting nature of Xanax, withdrawal may be more likely to occur with Xanax compared to Klonopin.

Frequently asked questions about Klonopin vs. Xanax

What is Klonopin?

Klonopin is a long-acting benzodiazepine that is FDA approved to treat panic disorders and seizures. It is available in immediate-release and orally disintegrating tablets. Klonopin can be used for seizure disorders in adults aged 18 years and older as well as children up to 10 years of age.

What is Xanax?

Xanax is a short-acting benzodiazepine that is used to treat anxiety disorders and panic disorders. It comes as an oral tablet, orally disintegrating tablet, extended-release tablet, and oral liquid. Xanax is typically prescribed in adults aged 18 years and older.

Are Klonopin and Xanax the same?

Klonopin and Xanax are not the same. Klonopin lasts longer in the body compared to Xanax. Klonopin can also be used to treat certain types of seizures in adults and children.

Is Klonopin or Xanax better?

Both Klonopin and Xanax are effective treatments for symptoms of anxiety and panic attacks. Klonopin can be taken once or twice daily in some cases while Xanax may need to be taken multiple times per day. Withdrawal symptoms may be more likely to occur with Xanax. Consult a physician to determine your best treatment option.

Can I use Klonopin or Xanax while pregnant?

Klonopin and Xanax are not generally recommended to be used during pregnancy. There is a possibility that these drugs could cause birth defects. Many medical professionals will recommend avoiding benzodiazepines if you are pregnant. Check with your healthcare provider for available treatment options while pregnant.

Can I use Klonopin or Xanax with alcohol?

Alcohol can compound the side effects of Klonopin or Xanax and lead to more serious adverse effects if taken together. Drinking alcohol while on Klonopin or Xanax can lead to severe drowsiness, loss of coordination, and respiratory depression. There are many cases of coma and respiratory depression in those who combine alcohol with benzodiazepines.

How does Klonopin make you feel?

Klonopin has anxiolytic effects that can help relax and calm symptoms of anxiety. After taking Klonopin, you may feel more at ease and less scared or stressed. Those who live with constant anxiety may feel more able to go about their daily life without constant worry.

Can Klonopin cause mental health issues?

Klonopin does not directly cause mental health issues. When taken as prescribed, Klonopin can help treat debilitating anxiety, panic disorders, and seizures. However, if you abuse Klonopin or are physically dependent on it, you may be more likely to experience withdrawal symptoms after discontinuing treatment. Withdrawal symptoms can include changes in behavior such as irritability, mood swings, and agitation. Klonopin should be tapered slowly in order to avoid withdrawal symptoms.