Buspirone (BuSpar): Uses, Side Effects, Dosage, Interactions & More

Buspirone, commonly known by the brand name BuSpar, is a prescription medicine used to treat anxiety. It belongs to a group of medicines called anxiolytics.

Unlike some fast-acting anxiety medicines, buspirone is generally taken regularly rather than only when anxiety suddenly occurs. It may take several weeks to reach its full effect.

This article explains what buspirone is, what it is used for, how it works, common and serious side effects, dosage information, drug interactions, precautions, and frequently asked questions.

Important: Buspirone is a prescription medicine. Take it only as directed by your doctor. Do not change the dose or stop treatment without medical advice.

What Is Buspirone?

Buspirone is an anti-anxiety medicine used to treat anxiety.

It works differently from benzodiazepines such as alprazolam or lorazepam. Buspirone affects certain chemical signaling systems in the brain, particularly pathways involving serotonin.

The generic name is buspirone. BuSpar is a former brand name; generic buspirone is available.

Buspirone Quick Facts

What Is Buspirone Used For?

Buspirone is primarily used to treat anxiety. It may be prescribed when a person has persistent anxiety symptoms that interfere with everyday life.

Anxiety may involve symptoms such as:

• Excessive worrying
• Feeling nervous or restless
• Difficulty concentrating
• Irritability
• Trouble sleeping
• Feeling tense or on edge

Buspirone may be part of a broader treatment plan that can also include talk therapy or other approaches.

Is Buspirone Used for Depression?

Buspirone is not primarily an antidepressant and is not approved simply as a treatment for depression.

A doctor may sometimes use it in combination with another medicine in particular circumstances, but this should only be done under medical supervision.

How Does Buspirone Work?

The exact mechanism of buspirone is not completely understood. It affects chemical signaling in the brain and has activity at certain serotonin receptors.

In simple terms, buspirone helps modify signaling involved in anxiety.

Unlike benzodiazepines, buspirone does not work by directly enhancing GABA activity.

Because its effects develop gradually, buspirone is generally not considered a medicine for immediate relief of a sudden anxiety or panic episode.

How Long Does Buspirone Take to Work?

Buspirone does not usually provide immediate relief.

Your doctor may gradually increase the dose, and it can take several weeks before the medicine reaches an effective level for you.

This is important because some people may expect buspirone to work like a fast-acting sedative. It generally does not.

Buspirone Dosage

The appropriate buspirone dose depends on the individual and should be determined by a healthcare professional.

Doctors may start with a lower dose and increase it gradually depending on how the person responds.

Buspirone is commonly taken twice daily, although the exact schedule and dose should follow the prescription.

Important Tip About Food

Take buspirone consistently either always with food or always without food. Switching between taking it with food and without food can change how much medicine your body absorbs.

Do not take more buspirone than prescribed.

What Happens If You Miss a Dose?

If you miss a dose, take it when you remember unless it is almost time for your next dose.

If the next dose is near, skip the missed dose and continue with your regular schedule.

Do not take two doses at the same time to make up for a missed dose.

Common Buspirone Side Effects

Like any medicine, buspirone can cause side effects.

Common side effects may include:

• Dizziness
• Headache
• Nausea
• Diarrhea
• Fatigue
• Nervousness
• Lightheadedness
• Weakness
• Difficulty sleeping
• Excitement or agitation
• Confusion
• Numbness

These symptoms may improve as your body adjusts to the medicine, but tell your healthcare professional if they are severe, persistent, or concerning.

Does Buspirone Make You Sleepy?

Buspirone can cause drowsiness or dizziness in some people.

Because people can react differently, avoid driving, cycling in traffic, or operating machinery until you know how buspirone affects you.

Serious Side Effects of Buspirone

Serious side effects are less common but require medical attention.

Contact a healthcare professional promptly if you experience:

• Fast or irregular heartbeat
• Unusual shaking
• Blurred vision
• Severe allergic symptoms
• Severe agitation
• Fever
• Heavy sweating
• Severe muscle stiffness or twitching
• Seizures
• Hallucinations
• Loss of coordination

These symptoms can sometimes indicate a serious reaction and should not be ignored.

Serotonin Syndrome

Buspirone affects serotonin pathways. When it is combined with certain other medicines that increase serotonin, a potentially serious condition called serotonin syndrome can occur.

Symptoms can include:

• Agitation
• Confusion
• Sweating
• Fever
• Shivering
• Fast or irregular heartbeat
• Muscle stiffness or twitching
• Loss of coordination
• Seizures

Seek urgent medical care if severe symptoms occur.

Buspirone Drug Interactions

Buspirone can interact with other medicines, so tell your doctor and pharmacist about all prescription medicines, over-the-counter products, vitamins, supplements, and herbal products you use.

1. MAO Inhibitors

Buspirone should not be taken with monoamine oxidase inhibitors (MAOIs) because the combination can cause dangerous increases in blood pressure. MedlinePlus also advises telling your healthcare professional if you have taken an MAOI within the previous two weeks.

Examples of MAOIs include:

• Phenelzine
• Tranylcypromine
• Selegiline
• Isocarboxazid

Some other medicines, including linezolid and methylene blue in certain situations, can also have MAOI activity.

2. Other Serotonin-Affecting Medicines

Some antidepressants and other medicines affect serotonin. Combining several serotonin-active medicines can increase the risk of serotonin syndrome.

Your doctor should review your medication list before starting buspirone.

3. Cimetidine

The over-the-counter medicine cimetidine can interact with buspirone. Tell your doctor or pharmacist before taking cimetidine while using buspirone.

4. Grapefruit and Grapefruit Juice

Large amounts of grapefruit or grapefruit juice may affect buspirone levels in the body.

It is best to discuss grapefruit consumption with your healthcare professional rather than consuming large amounts while taking buspirone.

Buspirone and Alcohol

Alcohol can increase the drowsiness associated with buspirone.

For this reason, MedlinePlus advises avoiding alcohol while taking buspirone.

If you drink alcohol regularly, discuss this with your doctor or pharmacist.

Buspirone and Other Anxiety Medicines

Buspirone is different from benzodiazepines such as:

• Alprazolam
• Lorazepam
• Diazepam
• Clonazepam

Benzodiazepines generally act more quickly and can cause sedation and dependence. Buspirone has a different mechanism and is generally used as a regular treatment for anxiety rather than immediate relief.

The choice of anxiety medicine depends on the person’s symptoms, medical history, other medicines, and treatment goals.

Is Buspirone Addictive?

Buspirone is generally described as a non-habit-forming anti-anxiety medicine and does not have the same dependence profile as benzodiazepines.

However, this does not mean that it should be taken without medical supervision. Take buspirone only as prescribed.

Who Should Not Take Buspirone?

Tell your doctor before taking buspirone if you:

• Have kidney disease
• Have liver disease
• Have a history of alcohol or drug misuse
• Have had an allergic reaction to buspirone
• Take MAO inhibitors
• Take medicines that affect serotonin
• Take medicines that may interact with buspirone
• Are pregnant or planning to become pregnant
• Are breastfeeding

Your doctor can determine whether buspirone is appropriate for you.

Buspirone During Pregnancy

If you are pregnant, planning pregnancy, or think you may be pregnant, tell your doctor before taking buspirone.

There may be situations where treatment decisions need to balance the mother’s health needs with potential risks to the pregnancy.

Do not start, stop, or change buspirone during pregnancy without speaking with your healthcare professional.

Buspirone While Breastfeeding

Tell your doctor if you are breastfeeding before taking buspirone.

Your healthcare professional can assess whether buspirone is appropriate based on your condition and the available information about treatment during breastfeeding.

Buspirone for Older Adults

Older adults may be more sensitive to medicine-related dizziness or other effects.

If buspirone causes dizziness or lightheadedness, it can increase the risk of falls. Your doctor may consider your age, other medicines, and medical conditions when deciding on treatment.

Can Buspirone Be Taken Every Day?

Yes. Buspirone is generally taken on a regular schedule, rather than only when anxiety suddenly appears.

Take it exactly as prescribed. Do not increase the frequency or dose because you feel anxious.

Can You Stop Buspirone Suddenly?

Do not stop a prescription medicine without discussing it with your healthcare professional.

If you believe you no longer need buspirone or are experiencing side effects, speak with your doctor about the safest way to change your treatment.

Buspirone Overdose

Taking too much buspirone can cause symptoms such as:

• Nausea
• Vomiting
• Dizziness
• Drowsiness
• Blurred vision

If you suspect an overdose, contact emergency medical services or a poison-control service immediately, particularly if severe symptoms occur.

What Should You Avoid While Taking Buspirone?

While taking buspirone:

• Avoid alcohol.
• Avoid large amounts of grapefruit or grapefruit juice.
• Do not drive until you know how the medicine affects you.
• Do not start new medicines or supplements without checking for interactions.
• Do not take MAO inhibitors with buspirone.
• Do not change your dose without medical advice.

Buspirone vs. Benzodiazepines

This comparison is general. A doctor should determine which treatment is appropriate for an individual.

Frequently Asked Questions About Buspirone

What is buspirone used for?

Buspirone is a prescription anti-anxiety medicine primarily used to treat anxiety.

Is BuSpar the same as buspirone?

BuSpar is a brand name associated with buspirone. Generic buspirone is available.

How long does buspirone take to work?

Buspirone usually does not provide immediate anxiety relief. It may take several weeks to reach its full therapeutic effect.

Does buspirone cause weight gain?

Weight changes are not among the main common side effects listed by MedlinePlus. If you notice unexplained weight changes while taking buspirone, discuss them with your healthcare professional.

Does buspirone cause sexual side effects?

Sexual side effects are not among the main common effects listed in the current MedlinePlus patient information. If you experience changes in sexual function, tell your doctor.

Can buspirone make anxiety worse?

Some people may experience nervousness, excitement, agitation, or other changes after starting treatment. If anxiety becomes significantly worse or you develop severe agitation or unusual behavior, contact your healthcare professional.

Can I take buspirone with antidepressants?

Sometimes buspirone and antidepressants may be used together, but the combination should be managed by a healthcare professional because some antidepressants affect serotonin and can increase the risk of serotonin syndrome.

Can I take buspirone with alcohol?

Alcohol can increase drowsiness caused by buspirone. MedlinePlus advises avoiding alcohol while taking it.

Is buspirone a sleeping pill?

No. Buspirone is an anti-anxiety medicine, not a sleeping pill. Although it can affect sleep in some people, it is primarily prescribed to treat anxiety.

Is buspirone a benzodiazepine?

No. Buspirone is not a benzodiazepine. It belongs to a different class of anti-anxiety medicines.

When Should You Seek Medical Help?

Seek urgent medical attention if you develop:

• Difficulty breathing
• Swelling of the face, lips, tongue, or throat
• Severe allergic reaction
• Seizures
• Severe confusion or hallucinations
• High fever with muscle stiffness or twitching
• A fast or irregular heartbeat
• Severe loss of coordination

These symptoms may indicate a serious reaction requiring immediate assessment.

Key Takeaways

• Buspirone is a prescription medicine used to treat anxiety.
• It is also known by the brand name BuSpar.
• Buspirone works differently from benzodiazepines.
• It is generally taken regularly rather than for immediate relief of sudden anxiety.
• It may take several weeks to reach its full effect.
• Common side effects include dizziness, headache, nausea, diarrhea, fatigue, and lightheadedness.
• Alcohol can increase drowsiness and should be avoided.
• Buspirone has important interactions with MAO inhibitors and some other medicines.
• Large amounts of grapefruit or grapefruit juice should be avoided unless your healthcare professional says otherwise.
• Never change the dose or combine buspirone with other medicines without checking with your doctor or pharmacist.

Medical Disclaimer

This article is for general educational purposes and does not replace professional medical advice, diagnosis, or treatment. Buspirone is a prescription medicine. Always follow your doctor’s or pharmacist’s instructions and seek medical advice if you develop concerning or severe symptoms.