Does Quitting Weed Lower Blood Pressure?

Short answer: probably yes, though the relationship between cannabis and blood pressure is more complicated than a simple before-and-after. THC actually affects blood pressure differently depending on whether you’re using it right now or have been using it heavily for years, and that split explains a lot of the confusing information out there.

What cannabis does to blood pressure in the short term

Right after using cannabis, most people experience a temporary spike in heart rate and, often, blood pressure — this is part of why some people feel their heart racing during or right after a session. Within a couple hours, that usually settles, sometimes dropping below baseline, which is part of why some people feel lightheaded standing up after using.

What happens with long-term, regular use

This is where it gets more relevant to quitting. Chronic, heavy cannabis use has been associated in several studies with a modest but real increase in resting blood pressure over time, along with changes to heart rate variability. The body seems to adapt to repeated THC exposure in ways that nudge the cardiovascular system toward a slightly higher baseline.

There’s also an indirect factor: heavy cannabis use is statistically linked to poorer sleep quality, higher stress reactivity in some users, and in some cases weight gain from appetite stimulation — all of which independently push blood pressure upward.

What tends to happen after quitting

For people who used heavily and stop, several things tend to shift in a direction that supports lower blood pressure over the following weeks and months:

• Resting heart rate often normalizes within the first few weeks
• Sleep quality improves, which independently supports healthier blood pressure regulation
• If appetite changes led to weight gain during use, that sometimes reverses gradually
• Stress hormone patterns can shift as the body adjusts to functioning without regular THC

None of this is instant. Most people don’t notice a measurable difference in the first week or two — the cardiovascular system tends to respond on a timeline closer to a month or more, in line with the broader quitting weed timeline.

An important caveat: withdrawal itself is stressful

Ironically, the first several days after quitting can involve elevated heart rate and blood pressure due to withdrawal-related anxiety and irritability, before things settle into the improved pattern. If you’re tracking your blood pressure closely during the first week of quitting, don’t be surprised or discouraged if the numbers look a little worse before they get better.

Who should pay closer attention

Anyone with a pre-existing cardiovascular condition, a family history of hypertension, or who’s been using heavily for years should mention their cannabis use and their decision to quit to a doctor. Blood pressure changes, in either direction, are worth monitoring with an actual cuff rather than guessing from how you feel — a lot of blood pressure change happens without noticeable symptoms.

FAQ

How long before blood pressure actually improves after quitting?

Most research and patient reports point to meaningful improvement showing up somewhere between three and eight weeks after stopping regular use, assuming other factors like diet and activity level stay roughly the same.

Can quitting cannabis raise blood pressure temporarily?

Yes — in the first several days, withdrawal-related stress and anxiety can push blood pressure and heart rate up before things stabilize and improve.

Does the method of use (smoking vs. edibles) change the effect on blood pressure?

Smoking adds an additional cardiovascular burden from the act of inhaling combustion products, on top of THC’s own effects, so quitting smoked cannabis specifically may bring an extra layer of cardiovascular benefit compared to quitting edibles alone.

Written by the CHS SOS Team · Last updated: July 2026