Before you buy any CBD product for epilepsy, talk to a neurologist. The only FDA-approved cannabis-derived medicine for epilepsy is prescription Epidiolex. For over-the-counter CBD, prioritize third-party lab testing, clear CBD concentration, and no claims that it treats or cures epilepsy.

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What to Look For

  • Third-party lab test, often called a certificate of analysis (COA), that shows cannabinoid content and tests for pesticides, heavy metals, and solvents.
  • Clear labeling of CBD and THC amounts per bottle and per serving.
  • Hemp grown in the US under a state or federal program.
  • Extraction with CO2 or ethanol, not hydrocarbon solvents.
  • No artificial flavors, colors, or preservatives.
  • Instructions for dosing and a phone number or email for customer support.

Parameter Bands to Compare

  • CBD dose: Clinical trials of Epidiolex used 10 to 20 mg per kg of body weight per day. Over-the-counter CBD dosing is not standardized. Most doctors suggest starting at 5 to 10 mg once or twice daily, then adjusting slowly. Never change dose without medical advice.
  • CBD to THC ratio: For epilepsy, high-CBD, low-THC products are common. Hemp-derived CBD must contain less than 0.3% THC by dry weight. Full-spectrum products may have trace THC. Isolate has none.
  • Concentration: Typical oils range from 5 to 50 mg of CBD per mL. A 30 mL bottle with 1,500 mg total equals 50 mg per mL. Choose based on your doctor's target dose.
  • Cost per milligram: Compare total CBD milligrams to total price. This helps you avoid overpaying for diluted products.

Common Pitfalls

  • Products that claim to cure epilepsy or replace anti-seizure drugs. That is a red flag.
  • No COA or a COA that does not match the product batch.
  • High-THC products sold as medical cannabis. THC can worsen seizures in some people and is not the focus of epilepsy treatment.
  • Unregulated online sellers with no physical address or lab reports.
  • Ignoring drug interactions. CBD can raise levels of clobazam and valproate, leading to side effects.

FAQ

Is CBD legal for epilepsy in the US?

Epidiolex is a prescription drug approved by the FDA for three rare epilepsy syndromes. Over-the-counter hemp CBD is legal federally under the 2018 Farm Bill, but state laws vary. OTC CBD is not approved to treat epilepsy.

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Can CBD replace my anti-seizure medication?

No. Never stop or reduce prescribed medication without a doctor's supervision. CBD may interact with your current drugs.

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What dose of CBD should I take for seizures?

Only a neurologist can determine a safe dose. Doses used in clinical trials were much higher than typical OTC serving sizes.

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Will CBD show up on a drug test?

Full-spectrum CBD may contain trace THC. If you are drug tested, choose a CBD isolate product and check the COA.