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And Welty said the studies that have featured humans for these other CBD uses have either been case reports or studies that did not compare results against a control group that did not use the oil.

“There’s no control, so it’s basically how do you know if we’re dealing with the true effect of the drug or just simply a placebo effect because somebody thinks they’ve been given a drug that will be beneficial?” Welty said.

“About 2 to 3 percent of individuals taking CBD actually had to discontinue because their liver enzymes went so high it was of concern to the people running the study,” he said.

For example, epilepsy studies found that “there were very clearly increases in the blood levels of some other anti-epileptic drugs when people were on CBD,” Welty said.

MONDAY, May 7, 2018 (HealthDay News) — Cannabidiol (CBD) oil has become the hot new product in states that have legalized medical marijuana.

“CBD is kind of a tricky drug because it’s not very well absorbed orally,” Welty explained. “Less than 20 percent of the drug is absorbed orally. If it isn’t made in the right way, you may not be getting much drug into your systemic circulation.”

This could mean that people taking anti-epilepsy drugs alongside CBD will need to adjust their dosage downward to avoid side effects, Welty noted.

Early studies show that CBD might help with this, especially if it’s related to arthritis, MS, diabetes, or Alzheimer’s. But scientists are still trying to prove that and figure out how it works.

National Conference of State Legislatures: “State Medical Marijuana Laws.”

Is It Addictive?

Government of the District of Columbia DOH: “Medical Cannabis

8) SARINYAPINNGAM / Thinkstock

Adverse Effects & Drug Interactions.”

A dermatology study found that oral consumption of hemp seed oil improves symptoms of atopic dermatitis, also known as eczema. Researchers attribute these results to the fatty acids found in hemp seed oil.

Journal of Hypertension: “Reduction of blood pressure and plasma triglycerides by omega-3 fatty acids in treated hypertensives.”

Health Benefits

Centers for Disease Control and Prevention: “State Heart Disease and Stroke Prevention Programs Address High Blood Cholesterol.”

Lower Blood Pressure

EuropeanJournal of Lipid Science and Technology: “Physiochemical studies of hemp (Cannabis sativa) seed oil using enzyme-assisted cold-pressing.”