The short answer
No supplement is approved to stop a panic attack. The FDA has approved one CBD drug, Epidiolex, and only for two rare seizure disorders: Dravet syndrome and Lennox-Gastaut syndrome. Treatment for panic disorder with the most evidence is cognitive behavioral therapy plus an SSRI drug. The options below cover the gap between episodes. None of them work during an attack.
Our pick: L-theanine, 200 mg
L-theanine is an amino acid found in green tea leaves. It comes as a capsule. A 200 mg dose costs about $0.10 to $0.25. It does not sedate most people, so it does not end a workday. Trial sizes are small and results are mixed. Serious side effects are rare. Onset takes 30 to 60 minutes. That timeline matters: a panic attack peaks within 10 minutes. Use it before a known trigger, such as a flight, a scan, or a presentation.
Why CBD Might Make My Anxiety Worse Sometimes
How the options compare
1. Oral lavender oil, 80 mg
- Sold in Germany as silexan. US capsules vary in strength and quality.
- Trials run 6 to 10 weeks. Some show lower anxiety scores than placebo, and one compared it to lorazepam.
- Side effects: burping and lavender taste. Case reports describe breast tissue changes in prepubertal boys.
2. Ashwagandha root extract
- Trial doses run 300 mg to 600 mg per day.
- Small placebo-controlled trials show lower cortisol and lower anxiety scores.
- The NIH and Cleveland Clinic list case reports of liver injury. Avoid it with thyroid disease, autoimmune disease, or pregnancy.
3. Magnesium glycinate
- Dose: 200 mg to 400 mg of elemental magnesium per day.
- Evidence for panic and anxiety is weak. Most studies cover premenstrual symptoms and sleep.
- Loose stool is the main side effect. Avoid it with kidney disease. It interacts with some antibiotics and diuretics.
4. CBD and hemp products
- Hemp with THC at or below 0.3% dry weight is legal under federal law. State rules differ.
- The FDA has not set a legal pathway for CBD in dietary supplements or food.
- Published anxiety trials used single CBD doses in the hundreds of milligrams.
- Full-spectrum products carry THC. THC raises heart rate and can trigger panic in some people.
5. Passionflower
- One small trial compared passionflower extract to oxazepam before surgery. Scores were close.
- Most studies have fewer than 50 participants.
6. Kava
Kava has trial data for anxiety. The FDA has warned about liver injury, including hepatitis and liver failure. Skip it if you drink alcohol, take acetaminophen, take a statin, or take any drug that stresses the liver.
full spectrum cbd vs isolate for panic attacks
Numbers to keep in mind
About 2.7% of US adults had panic disorder in the past year, per the National Institute of Mental Health. Sertraline and other SSRIs take 2 to 6 weeks to work. Benzodiazepines act in 15 to 30 minutes but carry dependence risk. Supplements act in 30 minutes or more.
If an attack is happening now
Chest pain, fainting, and trouble breathing need 911. For a mental health crisis, call or text 988. Slow breathing and grounding steps from therapy work faster than any capsule.