cbd and blood pressure regulation

Cbd and blood pressure regulation

The sample size of these studies was small and further research is required to establish whether CBD has a role in the treatment of cardiovascular disorders, but the results are promising.

“CBD can be effective in treating generalized anxiety disorder (GAD), social anxiety disorder, anxiety related insomnia, and post-traumatic stress disorder (PTSD),” she said.

On the other hand, cannabidiol does not directly bind to the CB1 and CB2 receptors. Instead, it causes a number of indirect actions leading to therapeutic benefits, such as activating TRPV1 receptors that regulate pain, body temperature, and inflammation.

Anti-Anxiety

New evidence links CBD to a decrease in blood pressure. For many people, CBD oil has fewer side effects than prescription medications, too.

Sarah Polansky, owner and developer of the CBD brand Prismatic Plants, told Public Goods that “The more you take CBD and help to regulate your adrenals, the less likely you’ll feel fatigued as your body returns to a state of balance rather than constant stress.”

How CBD Interacts with the Endocannabinoid System and Body

The patients were then given a series of stress tests to increase heart rate. Those who were given 600 mg of CBD had lower stress-induced blood pressure spikes than the control group.

Many of the cannabidiol products you’ll see in CBD stores or online are of lower quality, since – as with any product – it’s more expensive to produce high-end merchandise and it sells for a higher price, often with lower profit margins for the vendors.

Cbd and blood pressure regulation

Cold stress causes intense sympathoexcitation, producing a tachycardic and pressor response, and an increase in MSNA (32, 33). The pressor response is due to an initial rise in CO, in response to increased HR and a later increase in MSNA, causing vasoconstriction. Both MAP and TPR show a linear correlation with MSNA during cold stress (34). In our study, cold stress produced a pressor response in both groups, but, interestingly, while SBP and MAP continued to rise with placebo throughout the test period, the pressor response to cold was blunted in subjects who had taken CBD, and SBP and MAP were significantly lower. In keeping with this, TPR was lower with CBD than placebo, suggesting a possible inhibition of sympathetic outflow. This could also be due to analgesic properties of CBD (35), reducing cold stress and therefore minimizing the sympathetic response (also explaining why the cold pressor test was affected more by CBD than the exercise test). In the animal study of Resstel and colleagues (13), the authors suggested that the modulation of cardiovascular response was most likely secondary to attenuation of emotional response to stress. However, given our findings that CBD produced similar changes in cardiovascular parameters — though to a variable degree — during rest and stress, this may indicate that CBD also has direct cardiovascular effects.

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The isometric exercise stress caused a significant rise in the following parameters in both treatment groups; SBP (placebo P < 0.01, CBD P < 0.001; Figure 4A ), DBP (placebo P < 0.01, CBD P < 0.0001; Figure 4B ), MAP (placebo P < 0.01, CBD P < 0.0001; Figure 4C ), and HR (placebo P < 0.05, CBD P < 0.001; Figure 4D ).

METHODS. Nine healthy male volunteers were given 600 mg of CBD or placebo in a randomized, placebo-controlled, double-blind, crossover study. Cardiovascular parameters were monitored using a finometer and laser Doppler.

Upon arrival, subjects were rested for 10–15 minutes, and their baseline blood pressure and heart rate were recorded using a digital blood pressure (BP) monitor. Participants were given a standardized breakfast, and 15 minutes later, they were given either oral CBD (600 mg) or placebo in a double-blind fashion. This is a dose known to cause anxiolytic effects in humans and is comparable with what is used clinically (19, 37–39). Study medication consisted of capsules containing either 100 mg of CBD or excipients, which were a gift from GW Pharmaceuticals. There was no difference between the 2 formulations in color, taste, or smell.

Study design.

We have shown for the first time that to our knowledge that, in humans, acute administration of CBD reduces resting blood pressure, with a lower stroke volume and a higher heart rate. This response may be secondary to the known anxiolytic properties of CBD (16) and may account for the lack of anticipatory rise in blood pressure seen with placebo. These findings are in contrast to previous studies in humans, where CBD at the same dose did not affect baseline cardiovascular parameters (17–19), although changes in the cardiovascular system were not the primary outcome of these studies. In the present study, CV parameters were measured continuously, while in previous studies, monitoring for SBP, DBP, and HR were performed manually at only 1, 2, or 3 hours after drug delivery. Additionally, our subjects were cannabis naive, while the subjects of other studies had used cannabis in the past. Since tolerance may develop to the hemodynamic response to CBs in humans, this may explain the differences between studies.

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Looking at the individual response to the cold pressor test, 8 of 9 subjects had a lower SBP during the cold stress and in the recovery period after taking CBD ( Figure 2 ). Six of 9 subjects had a lower DBP during the cold pressor, and 7 of 9 subject had a lower DBP in the recovery period after taking CBD ( Figure 2 ).

The cold pressor test caused a significant rise in TPR (as expected) in the placebo group only ( Figure 5H ; P < 0.01) and rise in forearm skin blood flow with both CBD and placebo ( Figure 5I ; P < 0.05). The overall trend was for lower TPR and forearm skin blood flow in those who had taken CBD, with post-hoc analysis showing a reduction in both just before and in the latter half of cold stress ( Figure 5H [P < 0.05 to < 0.0001] and Figure 5I [P < 0.001]).

Discussion

CBD may cause sympathoinhibition (through CB1 or some other mechanism), thereby preventing an increase in blood pressure and cardiac output, causing a compensatory rise in heart rate to maintain cardiac output. Indeed, the changes in SBP preceded any changes in HR. Another possibility is that CBD inhibits cardiac vagal tone, thereby increasing heart rate (despite any potential sympathoinhibition). A recent study in male Sprague-Dawley rats showed that GPR18 activation in the rostral ventrolateral medulla (RVLM) by abnormal CBD (Abn-CBD) resulted in reduced blood pressure and increased heart rate (23) (similar to that observed in the present study). The same study showed that pretreatment with atropine and propranolol fully abrogated the HR response, suggesting a role for the autonomic nervous system. CBD is a weak partial agonist at GPR18 (24).

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Ten male subjects were recruited, but 1 withdrew for personal reasons. The mean age, weight, and height of the volunteers were 23.7 ± 3.2 years, 77.5 ± 6.4 kg, and 178.6 ± 4.5 cm (mean ± SD).