These sudden drops in blood pressure, also known as white outs or green outs, may indeed be linked to cannabis use. Dr. Melanie Bone, a board-certified OB-GYN and cannabis specialist who practices in West Palm Beach, Florida, told Weedmaps that “cannabis may cause a drop in blood pressure on standing — known as postural hypotension.” This type of drop in blood pressure is not desirable, as it can cause vertigo and even fainting. So, when we talk about “lowering blood pressure,” we do not necessarily consider that effect beneficial to health.
Dr. Bonni Goldstein, a medical adviser to Weedmaps and the director of Canna-Centers in Lawndale, California, outlined the potential effects of THC on blood pressure:
To answer this question, we should focus on two of the primary cannabinoids present in cannabis : cannabidiol (CBD) and tetrahydrocannabinol (THC). Both may exert an influence on blood pressure levels.
Here we’ll address how smoking weed, including medical marijuana, could factor into your blood pressure levels.
Goldstein added, “CBD does not appear to have the same risks for the heart as THC and in fact, appears to be somewhat cardioprotective.” To support this assertion, Goldstein cited a 2010 study published in the Journal of the American College of Cardiology in which researchers concluded that CBD has therapeutic potential in treating complications of diabetes, as well as some cardiovascular disorders. Most notably, CBD could reduce inflammation, a condition that can ultimately damage the blood vessels, arteries, and vital organs. So, if you apply CBD oil to your skin or swallow a few tablespoons, the impact could differ greatly than if you smoked a blunt.
Because the FDA has not approved over-the-counter CBD products, there is no official recommendation for a dose of CBD. The right dose depends on your weight, genetics, sex and medical history. More studies need to be conducted with human subjects to get an accurate dosage.
“CBD lowers blood pressure by reducing cortisol levels and dilating blood vessels, allowing more blood flow and leading to lower blood pressure,” Park said.
Many CBD oils come in dropperful (1 ml) doses of 10 mg/ml. Cannabidiol affects different people, particularly based on the weight, metabolism and body type. However, Park said the effective therapeutic dose is usually in the range of 20 mg to 300 mg, or 2 to 30 dropperfuls.
Choosing CBD Oil for High Blood Pressure
Called a “vasorelaxant” by researchers, CBD oil’s anti-inflammatory properties may lower blood pressure by allowing the free flow of blood through your heart, arteries and veins.
When you visit the doctor, you’ll usually hear your blood pressure described by two numbers, like 120/70.
High blood pressure can be naturally lowered by reducing stress, salt intake, and consumption of alcohol and tobacco. You can also lower your blood pressure by exercising regularly and eating more fruits and vegetables.
Capsules and edibles, for example, must make their way through the digestion process before the CBD can be released into the blood stream and carried throughout the body. Vaping or administration under the tongue make the cannabidiol available almost immediately, since it’s absorbed quickly by the sublingual glands or tissues in the lungs. And topical CBD usually doesn’t even make it into the bloodstream, since it’s blocked by the epidermis.