Other research (both animal and human) has shown that CBD has anti-inflammatory effects, and it may relieve pain by this mechanism.
CBD can interact with other medications used to treat heart conditions or immunosuppressants so you should always talk with your doctor before taking CBD.
Conclusion: CBD is unlikely to be effective by itself for nausea and vomiting. The combination of THC and CBD does seem to be effective for nausea and vomiting.
Most studies investigating if CBD is beneficial at relieving nausea or vomiting, have used a combination of CBD and THC, rather than just CBD alone. A 2016 review found the combination to be either more effective or as effective as a placebo. 14
CBD (short for cannabidiol) is one of over 200 chemical compounds known as cannabinoids that are found in cannabis. It is the second most prevalent active compound found in cannabis, behind THC (tetrahydrocannabinol), which is the compound in cannabis that has psychoactive properties and gives people a high. 2
Animal studies have shown that CBD has anti-inflammatory effects and works on the endocannabinoid and pain-sensing systems to relieve pain.
Some cannabis-based products are available to buy over the internet without a prescription.
If the above does not apply to you, do not ask a GP for a referral for medical cannabis.
A prescription for medical cannabis would only be given when it was believed to be in your best interests, and when other treatments had not worked or were not suitable.
And some cannabis-based products are available on prescription as medicinal cannabis. These are only likely to benefit a very small number of patients.
Nabilone is a medicine, taken as a capsule, that has been developed to act in a similar way to THC (the chemical in cannabis that makes you high). You may have heard it described as a “manmade form of cannabis”.
In all but a few studies, lower doses of CBD (10 milligrams per kilogram, mg/kg, or less) improved some symptoms of anxiety. Higher doses (100 mg/kg or more) exhibited virtually no effect.
There is currently no known “correct” dose of CBD oil. Depending on individual needs and what is being treated, the daily dose may range between 5 and 25 mg.
CBD shows promise in the treatment of anxiety disorders, suggests a 2015 review of studies in the journal Neurotherapeutics. According to the investigators, CBD demonstrated potent anxiolytic (anxiety-relieving) effects in animal research, albeit with counterintuitive results.
Human studies evaluating the use of CBD in treating chronic pain are lacking. Those that do exist almost invariably include THC, making it difficult to isolate CBD’s distinct effects.
In an analysis of 14 published studies (nine involving animals and five involving humans), scientists with the University of Montreal concluded that CBD showed promise in treating people with opioid, cocaine, or psychostimulant addiction.