MAYO CLINIC CBD products can cause side effects

and multiple sclerosis. Some evidence suggests that CBD may be useful in treating pain, indicating that there could be a role for CBD as an alternative to opioid medication for challenging chronic pain or to treat opioid addiction.

Before you try nonprescription CBD for any medical concern, you need to talk with your health care provider. There are a few reasons for that. First, CBD can interfere with other medications, so it's important to review your current medications with your health care provider to confirm that CBD won't affect them.

Second, CBD can cause side effects, including dry mouth, diarrhea, reduced appetite, drowsiness and fatigue. It also can affect liver function. Before you begin taking CBD, your health care provider may recommend a liver function test, along with follow-up tests while you're taking CBD, to check that your liver is not being damaged.

Third, if you and your health care provider decide CBD may be worthwhile for you, he or she can help you determine which product to buy.

Certain brands and preparations of nonprescription CBD have been tested to verify the amount of CBD they contain and identify other ingredients in them. Your health care provider can help you find one of those verified products.

Do not take a nonprescription CBD product without consulting your health care provider first. Although CBD shows some promise, many CBD products on the market today are poorly regulated, and manufacturer's claims about their benefits are unsubstantiated, so it's important to proceed with caution.