Many people ask, "Will cannabis lower blood pressure?” It’s a reasonable thought since cannabis is often associated with relaxation and some believe it might also ease tension in the blood vessels. However, the relationship between cannabis and blood pressure is far more complex than it seems.

This blog looks at what current research says about how cannabis affects blood pressure and the cardiovascular system. We’ll briefly explore the key influencing factors and whether it could play a role in managing hypertension.

However, research remains limited and inconclusive and most studies are small or based on trials. If you have high or low blood pressure or any heart condition, it’s best to consult a healthcare professional before using cannabis.

 

Understanding Blood Pressure and How It Works

Blood pressure (BP) measures the force of blood against artery walls, expressed as systolic over diastolic (e.g., 120/80 mmHg). High BP (hypertension) strains arteries and organs while low BP (hypotension) can cause dizziness and poor circulation.

BP is controlled by several systems:

• Autonomic nervous system: Adjusts heart rate and vessel constriction.
• RAAS: Regulates fluid and sodium balance.
• Vascular tone and endothelial function: Controls vessel dilation.
• Kidneys: Manage blood volume.

 

Factors like hormones, stress, diet and lifestyle also influence BP which makes substances such as cannabis capable of affecting it in complex and unpredictable ways.

 

How Cannabis Interacts With the Body

Cannabis affects the body through compounds called cannabinoids which interact with the endocannabinoid system (ECS) a network that regulates mood, pain, appetite and heart function.

The ECS has two main receptors:

• CB₁ receptors: Found in the brain and heart, they influence mood, coordination and blood vessel function.
• CB₂ receptors: Located in the immune system, they help manage inflammation.

 

When cannabinoids like THC and CBD enter the body, they act on these receptors in different ways:

• THC can temporarily raise heart rate and blood pressure, then cause blood vessels to widen
• CBD is non-psychoactive and may relax blood vessels, reduce inflammation and ease stress-related blood pressure spikes.

 

The effects depend on dose, strain and method of use whether inhaled or eaten. Since everyone’s body reacts differently, cannabis may either raise or lower blood pressure based on individual health and tolerance.

 

What Research Says About Cannabis and Blood Pressure

Studies on cannabis and blood pressure show mixed results. Research from the American Heart Association notes that THC can temporarily raise heart rate and blood pressure right after use, followed by a short-term drop as blood vessels relax. This response can vary from person to person.

A 2017 study published in JCI Insight found that CBD lowered resting blood pressure and reduced stress-related spikes in healthy adults. However, researchers emphasized that larger and longer studies are needed to confirm these findings.

Some long-term cannabis users also show slightly lower resting blood pressure but it’s unclear whether this is due to cannabis itself or related lifestyle factors. Overall, current evidence suggests that the answer to “will cannabis lower blood pressure” depends on the compound used, dosage and individual health condition.

 

Factors That Influence Cannabis’ Effect on Blood Pressure

Several factors determine how cannabis affects blood pressure:

• Cannabinoid content: High-THC strains are more likely to increase heart rate while CBD-rich strains may promote relaxation
• Dosage: Low doses might calm the body but higher doses can trigger spikes in heart rate and blood pressure.
• Method of use: Smoking or vaping delivers quick effects while edibles act slower but last longer. Using a water bong can also affect how cannabis is absorbed and its overall impact on blood pressure.
• Tolerance and frequency: Regular users may develop tolerance which reduces strong cardiovascular reactions.
• Personal health: Age, existing heart conditions, stress levels and medications all play a role in how the body responds.

 

Can Cannabis Be Used for Hypertension Treatment?

Currently, cannabis is not an approved treatment for high blood pressure. While early research on CBD shows potential benefits for vascular relaxation and stress management, there’s not enough evidence to recommend it as a medical therapy.

• Clinically proven ways to manage hypertension still include:
• Maintaining a healthy diet (low in sodium, rich in fruits and vegetables)
• Exercising regularly
• Managing stress and sleep
• Taking prescribed medications when needed
• Cannabis may offer supportive effects for relaxation, but it should never replace medical treatment without a doctor’s supervision.

 

Final Thoughts

Cannabis affects blood pressure in complex ways but it can raise or lower it depending on the strain, dose and your health. While CBD may show mild benefits for stress and circulation, THC can trigger temporary spikes in heart rate and pressure.

The science is still evolving and more controlled research is needed to understand long-term effects. For now, anyone considering cannabis especially those with heart or blood pressure concerns should consult a healthcare professional to make safe and informed decisions.