A prescription form of CBD is approved for treating seizure disorders (such as epilepsy). While CBD is also used for conditions like anxiety, pain, dystonia (a muscle disorder), Parkinson's disease, Crohn's disease, and more, there is insufficient scientific evidence to support its effectiveness for these uses.
In 2018, laws were passed that legalized the sale of hemp and hemp-derived products in the US. However, this does not mean all CBD products made from hemp are automatically legal. Since CBD is an FDA-approved prescription medication, it cannot be legally added to food or dietary supplements. Instead, CBD can only be included in "cosmetic" products. Despite this, there are still many CBD products on the market labeled as dietary supplements, and the actual amount of CBD in these products may not always match what is listed on the label.
Likely Effective For:
Seizure Disorder (Epilepsy): The prescription CBD product Epidiolex (by GW Pharmaceuticals) is FDA-approved to treat seizures associated with Dravet syndrome, Lennox-Gastaut syndrome, and tuberous sclerosis complex. It is still uncertain whether other forms of CBD are effective for seizures, so it's best to use the FDA-approved prescription option for this condition.
While there is growing interest in using CBD for various other health issues, there isn't enough reliable evidence to confirm its effectiveness for these conditions.
Multiple Sclerosis (MS): A prescription nasal spray product, Sativex (by GW Pharmaceuticals), which combines both 9-delta-tetrahydrocannabinol (THC) and cannabidiol, has been shown to effectively reduce pain, muscle tightness, and frequency of urination in people with MS. This product is available in over 25 countries outside of the United States. However, when used alone, cannabidiol has inconsistent evidence regarding its effectiveness for MS symptoms. Some early studies suggest that a cannabidiol spray taken under the tongue may help alleviate pain and muscle tightness, but it does not seem to improve muscle spasms, fatigue, bladder control, mobility, or overall quality of life for MS patients.