Drug & supplement interaction

Cannabigerol (cbg) + Prazosin

Prazosin brand names: Minipress, Prazo, Prazin.

Moderate Interaction
Medically reviewed by · Updated September 2026
The bottom line Moderate

Cannabigerol (cbg) has a moderate interaction with Prazosin. Theoretically, taking cannabigerol with antihypertensive drugs might increase the risk of hypotension.

Read the full interaction report
SeverityModerate
LikelihoodPossible
EvidenceD
What do Severity, Likelihood & Evidence mean?
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Interaction report

Cannabigerol (cbg) and Prazosin

Here is the interaction we found between these two, with the evidence behind it.

Moderate

ANTIHYPERTENSIVE DRUGS

Why this applies to Prazosin

Prazosin falls under ANTIHYPERTENSIVE DRUGS — the group Cannabigerol (cbg) interacts with.

Theoretically, taking cannabigerol with antihypertensive drugs might increase the risk of hypotension.
Animal research shows that an intraperitoneal injection of cannabigerol lowers blood pressure. The mechanism of action may be related to alpha-2-adrenoreceptor activity. The effect of oral intake of cannabigerol is unclear and this has not been shown in humans.
Severity Moderate Likelihood Possible Evidence D

Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the gist: prazosin already lowers your blood pressure by relaxing your blood vessels, and there's a theory that CBG might do something similar. If both nudge your pressure down at the same time, the combined effect could leave you feeling lightheaded, dizzy, or faint, especially when you stand up quickly. Prazosin is already known for a 'first-dose' drop in blood pressure, so anything that adds to that is worth watching.

That said, I want to keep this in perspective. The blood-pressure-lowering effect of CBG has only been seen in animals given an injection, not in people taking it by mouth. So this is theoretical and far from proven. Still, if you'd like to try CBG, mention it to your pharmacist or doctor first and keep an eye on how you feel.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Vernail VL, Bingaman SS, Silberman Y, Raup-Konsavage WM, Vrana KE, Arnold AC. Acute cannabigerol administration lowers blood pressure in mice. Front Physiol 2022;13:871962. PubMed

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
  • ProbableInteraction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • PossibleInteraction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
  • UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Evidence the quality of the studies behind the rating (graded A–D)
  • AHigh-quality meta-analysis (quantitative systematic review).
  • BCase-control study.
  • CConsensus.
  • DAnecdotal evidence.

These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.

Keep it in perspective

Cannabigerol (cbg) Also Interacts With Other Medications

Cannabigerol (cbg) has 171 moderate known drug interactions in our database — the Prazosin one above is one of them. If you take anything else, check it against the full list below.

Moderate 171 No known interaction 2,659 (incl. Prazosin)
Taking anything else?

Check Another of Your Medications Against Cannabigerol (cbg)

Covers the 2,830 medications we’ve checked against Cannabigerol (cbg). Pick one to open its full report.

Everything else you take

See Every Supplement That Interacts With Prazosin

This page covers Cannabigerol (cbg) only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Prazosin page lists 137 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), American Mistletoe (major), Tyramine (major) and Adrafinil (moderate).

By severity: 4 major · 112 moderate · 21 minor.

From our pharmacist’s overview on the Prazosin page

“Prazosin (Minipress) relaxes blood vessels by blocking alpha receptors, which is why doctors prescribe it for high blood pressure and, often, for PTSD nightmares. Sudden pressure drops with dizziness or fainting are already its signature risk, so the 137 supplements on this list warrant genuine attention rather than a quick skim.”

Reviewed by 2 · Jul 18, 2026

Open the Prazosin interaction page

How much people look this up

Where Cannabigerol (cbg) and Prazosin Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Cannabigerol (cbg)
Steady interest

#1,075 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Prazosin
Top half

#846 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Supplement

About Cannabigerol (cbg)

What is Cannabigerol (cbg)?

  • Anxiety and stress
  • Pain and inflammation
  • Sleep support
  • Focus and mood
  • Digestive discomfort

Cannabigerol (CBG) is a minor cannabinoid from the cannabis (hemp) plant that is marketed for anxiety, pain, and inflammation, but human research is very limited and most claims rest on laboratory and animal studies. It appears to be generally well tolerated in early reports, but its long-term safety, quality, and dosing are not well established. Talk to your pharmacist or doctor before trying it, especially if you take other medicines or are pregnant or breastfeeding.

Read the full Cannabigerol (cbg) monograph & all interactions
Medication

About Prazosin

What Is Prazosin Used For?

Brand names: Minipress, Prazo, Prazin

Prazosin hydrochloride capsules are used to treat high blood pressure (hypertension). Lowering blood pressure reduces the risk of serious cardiovascular events, including strokes and heart attacks. It can be used alone or combined with other blood pressure medications, such as diuretics (water pills) or beta-blockers.

Managing high blood pressure is part of a broader approach to heart health, which may also include changes to diet, exercise, and other medications as directed by your prescriber.

See full Prazosin drug information
Keep checking

Other Drugs & Cannabigerol (cbg)

Browse every other medication we’ve checked against Cannabigerol (cbg) — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
171Moderate
0Minor
2,658No known interaction
171 Moderate 2,658 No interaction
Moderate

171 interactions

Showing 60 of 171 moderate interactions — see all 171 on the Cannabigerol (cbg) page.

No interaction 2,658 drugs checked — show the list

We also checked Cannabigerol (cbg) against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,658 medications checked with no known interaction — see the full Cannabigerol (cbg) list.

See the full Cannabigerol (cbg) interactions page
See every supplement checked against Prazosin, ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

Keep exploring
Cannabigerol (cbg) monograph › Uses, safety, and every drug interaction in one place Prazosin supplement interactions › Every supplement checked against Prazosin, ranked by severity Prazosin drug information › The full plain-English guide to this medication Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Cannabigerol (cbg) and Prazosin Together: Common Questions

Can you take Cannabigerol (cbg) with Prazosin?
There is a moderate interaction, so it may be acceptable with monitoring or timing changes — but check with your pharmacist first. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Cannabigerol (cbg) and Prazosin interaction?
We rate it Moderate. This combination may require monitoring, a dose adjustment, or separating the times you take each one. Consult your pharmacist before using them together.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Still Have a Question About Prazosin and Cannabigerol (cbg)?

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.