Using cannabis can make some people feel relaxed, but it can have the opposite effect on others. Instead of feeling calm, you might suddenly feel frightened, notice your heart racing or become convinced that something is wrong. These feelings can be intense, especially if you have never experienced them before.
A cannabis-induced panic attack happens when using cannabis triggers a sudden wave of fear or anxiety. It can affect your body, thoughts, and perception of what’s happening around you. The experience may pass as the effects wear off, but it can still feel frightening while it’s happening.
In this guide, we’ll explain the symptoms of a cannabis-induced panic attack, why it can happen, how long it may last, and what you can do to feel safer. We’ll also cover when to seek medical help and what to do if cannabis use is starting to affect your mental health.
What Is a Cannabis-Induced Panic Attack?
A cannabis-induced panic attack is an episode of intense fear or anxiety triggered by cannabis use. It can happen after smoking, vaping, or eating cannabis products, including edibles.
Cannabis contains a compound called THC, which causes the main intoxicating effects. THC can change how you think, feel, and interpret what’s happening around you. For some people, these changes feel pleasant, but others may experience paranoia, confusion, or sudden panic.
A panic attack can cause physical symptoms that make the experience even more frightening. You might feel your heart pounding, struggle to catch your breath, or worry that you’re losing control. Some people fear they are having a heart attack or that something terrible is about to happen.
These reactions can happen even if you’ve used cannabis before without any problems. Your experience can depend on the amount consumed, the strength of the product, your surroundings and how you’re feeling at the time.
What Are the Symptoms of a Cannabis-Induced Panic Attack?
A cannabis-induced panic attack can affect both your body and your mind. You might notice physical changes, such as a racing heart, alongside intense fear or worrying thoughts. Symptoms vary from person to person, but common signs include:
| Physical Symptoms | Mental Symptoms |
|---|---|
| Racing or pounding heartbeat | Sudden, intense fear or panic |
| Sweating or trembling | Racing thoughts or feeling overwhelmed |
| Dizziness or feeling faint | Fear of losing control or dying |
| Shortness of breath or rapid breathing | Paranoia or feeling unusually suspicious |
| Nausea or stomach discomfort | Feeling that something terrible is about to happen |
| Tingling in the fingers or lips | Feeling detached from yourself or your surroundings |
| Feeling hot, cold or weak | A distorted sense of time or feeling that things are unreal |
Why Does Cannabis Cause Panic Attacks?
Cannabis affects people differently. A product that leaves one person feeling relaxed may cause another to feel anxious or frightened.
High-THC Cannabis
THC is the main compound responsible for the intoxicating effects of cannabis. Products containing high levels of THC can increase the risk of anxiety, paranoia and panic, particularly if you’re inexperienced or consume more than you intended.
The strength of cannabis products can vary, and it isn’t always easy to know exactly how much THC you’ve taken. A stronger product may have a more intense effect than you expect.
Taking Too Much Cannabis
Consuming more cannabis than your body can comfortably handle can lead to unpleasant effects. This can happen when smoking or vaping, but it is also a concern with edibles.
Edibles can take longer to produce noticeable effects, so you may consume more before the first amount has fully taken effect. The effects can then become stronger than expected and last for several hours.
Existing Anxiety or Stress
Your mental state before using cannabis may influence how you react. If you’re already feeling stressed, anxious or overwhelmed, cannabis may intensify those feelings.
People with a history of panic attacks may also find that cannabis triggers similar symptoms. However, you don’t need to have an anxiety condition to experience panic after using it.
Unfamiliar Surroundings or Mixing Substances
Your surroundings can affect how comfortable you feel after using cannabis. An unfamiliar place, an uncomfortable social situation or being around people you don’t trust may make feelings of anxiety worse.
Mixing cannabis with alcohol or other drugs can also make its effects less predictable. If you’ve experienced panic after using cannabis, avoid taking more substances to try to manage the feeling.
How Long Does a Cannabis-Induced Panic Attack Last?
A typical panic attack lasts around 5 to 20 minutes, although some can last up to an hour. However, if cannabis triggers the panic, feelings of anxiety may continue for several hours as the effects of THC wear off.
One clinical study of people treated in an emergency department for cannabis-induced anxiety found that symptoms lasted a median of 6.1 hours. The middle 50% of cases lasted between 2.3 and 12.5 hours, although these figures reflect people who needed emergency care rather than everyone who experiences panic after using cannabis.
How long the effects last also depends on how you take cannabis:
- Smoking or vaping: The effects usually last around 2–4 hours, although some effects can linger for up to 24 hours.
- Eating cannabis edibles: The effects can last around 4–12 hours, with some lingering effects lasting up to 24 hours.
What to Do During a Cannabis-Induced Panic Attack
A panic attack after using cannabis can feel overwhelming, but there are steps you can take to help yourself stay safe while the symptoms settle.
Move Somewhere Calm and Safe
If your surroundings are making you uncomfortable, move to a quiet place where you feel secure. Sit down if you’re dizzy or unsteady, and ask a trusted, sober person to stay with you if possible.
Let them know what you’ve taken and how you’re feeling. Having someone calm nearby can help you feel less alone while you wait for the effects to ease.
Slow Your Breathing
Anxiety can cause you to breathe quickly, which may make dizziness and tingling sensations worse. Try breathing gently and steadily, without forcing deep breaths or holding your breath for long periods.
Focus on making each breath comfortable. If concentrating on your breathing makes you feel more anxious, try another grounding technique instead.
Ground Yourself in the Present
When your thoughts start racing, focus on simple things around you. You could name five things you can see, notice the feeling of your feet against the floor or describe the sounds you can hear.
You can also remind yourself that cannabis may be contributing to what you’re feeling and that the effects will change over time. This may help you feel more settled, although it cannot guarantee that the symptoms will stop immediately.
Avoid Taking More Substances
Don’t take more cannabis to try to calm yourself down. Avoid alcohol and other drugs, as they can make the situation less predictable and may worsen your symptoms.
If you’ve consumed an edible, don’t take more simply because you haven’t felt the full effects yet. Stay somewhere safe, avoid driving and give your body time to process what you’ve already taken.
Know When to Get Medical Help
Not every episode of panic after cannabis use is harmless. Chest pain, severe breathing difficulties, collapse, seizures or extreme confusion need urgent medical assessment.
Call 999 if you or someone else develops serious symptoms after taking cannabis. Tell the medical team what was taken, how much was consumed if known, and whether any other substances were involved.
Don’t assume that severe symptoms are just a panic attack. It’s safer to get medical help when you’re unsure what is happening.
Can Cannabis-Induced Panic Attacks Happen Again?
Yes. If cannabis has triggered a panic attack once, using it again may trigger another episode. This doesn’t mean it will happen every time, but previous experiences can make you more aware of physical sensations and more worried about experiencing the same feelings again.
Trying a different product or taking a smaller amount cannot guarantee that you won’t experience panic. Cannabis products vary in strength, and individual reactions can be difficult to predict.
If you’ve experienced a cannabis-induced panic attack, the safest option is to avoid using cannabis again, particularly if the experience was severe. If you continue to feel anxious about what happened, a GP or mental health professional can help you work through those feelings.
When Should You Seek Professional Help?
You should consider speaking to a healthcare professional if cannabis use is affecting your mental health or making everyday life harder to manage.
It may be time to seek support if you:
- Experience repeated panic attacks after using cannabis
- Continue feeling anxious or paranoid when you’re no longer intoxicated
- Struggle to sleep, work or maintain relationships because of your symptoms
- Use cannabis to cope with difficult feelings but find your anxiety getting worse
- Want to stop using cannabis but find it difficult to do so
A GP can assess your symptoms and discuss suitable support. If cannabis use has become difficult to control, you may also benefit from talking to an addiction support service.
Seek urgent medical help if you experience severe or unusual symptoms, particularly chest pain, serious breathing difficulties, seizures or severe confusion.
How AnorMed Can Help With Cannabis Addiction
If cannabis use is starting to affect your mental health, relationships or daily routine, speaking to someone about your options can be a useful first step.
AnorMed is an independent addiction treatment referral service that helps people explore suitable treatment options in the UK and Europe. Our advisors can discuss your circumstances and help you understand which options may be available.
Depending on your needs, these may include counselling, outpatient support or residential rehabilitation. The right option will depend on your circumstances, the extent of your cannabis use and the type of support you need.
You don’t have to wait until cannabis use has caused a serious problem before asking for advice. If you’re finding it difficult to cut down or stop, AnorMed can help you explore the next steps.
Frequently Asked Questions
Can cannabis cause a panic attack the first time you use it?
Yes. Cannabis can trigger anxiety or panic even if you’ve never used it before. The risk may be higher with products containing high levels of THC or when someone consumes more than they can comfortably tolerate. Reactions vary, so previous experience with cannabis doesn’t guarantee that you’ll always respond in the same way.
Can a cannabis-induced panic attack feel like a heart attack?
Yes. Panic can cause a racing heartbeat, chest discomfort, sweating, dizziness and shortness of breath. However, these symptoms can also have other medical causes. If you experience chest pain or severe breathing difficulties after using cannabis, seek urgent medical attention instead of assuming you’re having a panic attack.
Can a cannabis-induced panic attack affect your sleep?
Yes. Anxiety, racing thoughts, and feeling unsettled after using cannabis can make it harder to fall asleep. If you continue having sleep problems after the effects have worn off, speak to a healthcare professional.
Can CBD prevent a cannabis-induced panic attack?
There is not enough evidence to rely on CBD to prevent a panic attack caused by cannabis. Some research suggests CBD may reduce certain anxiety effects of THC, but the results are mixed. Avoid using CBD as a way to make cannabis use safe.
Does having a cannabis-induced panic attack mean you have a mental health condition?
No. A panic attack after using cannabis does not automatically mean you have an anxiety disorder or another mental health condition. However, recurring panic, ongoing anxiety or unusual changes in your thoughts and perception should be assessed by a healthcare professional.