Delta 9 THC is not legal everywhere, and the answer depends on your state. Healthline’s delta-9 explainer says delta-9 isn’t federally legal in the United States and that each state has its own laws. That line speaks about cannabis delta-9 in general, so for hemp-derived products, check your state’s current rules before you buy. The O’Flaherty Law article lists Connecticut, Michigan, New Mexico and Oregon, plus the District of Columbia, as allowing delta-9 for recreational or medical use. It lists Hawaii, Louisiana and New Hampshire as allowing it for medical use only, with a medical card or prescription.
| Federal status | Healthline’s delta-9 explainer says delta-9 isn’t federally legal in the United States, speaking of cannabis delta-9 in general |
| Recreational or medical use | Connecticut, District of Columbia, Michigan, New Mexico, Oregon (O’Flaherty Law article) |
| Medical use only | Hawaii, Louisiana, New Hampshire, with a medical card or prescription (O’Flaherty Law article) |
| Restricted or banned | Described as allowing only CBD products or THC at 0.3% or less, but the O’Flaherty Law article names no states (O’Flaherty Law article) |
| Flying with delta-9 | Illegal under federal law, per the O’Flaherty Law article |
| Driving while impaired | Always illegal if you’re under the influence, with penalties similar to DUIs for alcohol, per the O’Flaherty Law article |
| Delta-8 explicitly allowed | 26 states, per the O’Flaherty Law article |
Which states allow delta 9 THC?
The O’Flaherty Law article sorts states into groups for delta-9. Here is how it lists the states it names.
| State or district | Rule per the O’Flaherty Law article |
|---|---|
| Connecticut | Recreational or medical use |
| District of Columbia | Recreational or medical use |
| Michigan | Recreational or medical use |
| New Mexico | Recreational or medical use |
| Oregon | Recreational or medical use |
| Hawaii | Medical use only, with a medical card or prescription |
| Louisiana | Medical use only, with a medical card or prescription |
| New Hampshire | Medical use only, with a medical card or prescription |
The O’Flaherty Law article describes restricted states as allowing only CBD products or THC at 0.3% or less, but it names none. Its delta-9 list is partial: it names eight jurisdictions and no restricted or banned states, so it cannot tell you which states prohibit delta-9. Read your state’s own cannabis law before you order.
Is delta 9 legal in all 50 states?
Healthline says each state has its own laws, so the answer is state by state. The O’Flaherty Law article’s delta-9 list names eight jurisdictions and no restricted or banned states. Check your state’s own cannabis law before you buy.
Is delta 9 legal in NC?
North Carolina isn’t on either delta-9 list in the O’Flaherty Law article. It does appear on that article’s delta-8 list of states where delta-8 is explicitly allowed. Check North Carolina’s current rules before you buy, because both Healthline and the O’Flaherty article say cannabis laws change often.
Is delta 9 federally legal, and can you fly with it?
Healthline’s delta-9 explainer says delta-9 isn’t federally legal in the United States. The O’Flaherty Law article says flying with delta-9 THC is illegal under federal law and advises against carrying it on flights. For delta-8, the same article says flying is legal under federal law, but that depends on the laws of your destination state.
Can delta 9 be shipped in the mail?
Mailing is a separate question from flying. Before you order, ask the seller which states it ships to and whether your state is on that list. Ask in writing so you have the answer on record.
Is delta 9 a felony?
The O’Flaherty Law article says driving with delta-9 THC is always illegal if you’re under its influence, with penalties similar to DUIs for alcohol. For whether a delta-9 charge is a felony, read your state’s cannabis statute or ask a local defense attorney what a charge would mean where you live.
Will delta 9 get you stoned?
Yes. Healthline says delta-9 is the form of THC that makes cannabis intoxicating, and that when people talk about THC’s effects, they are usually talking about delta-9.
A 2023 study in Cannabis and Cannabinoid Research looked at how CBD changes THC’s effects. The 2023 THC and CBD study was a double-blind, placebo-controlled lab trial with 28 healthy volunteers who had used cannabis before. It tested CBD-to-THC ratios of 1:1, 2:1 and 3:1. At the 1:1 ratio, the lowest CBD dose of 2.5 mg with 0.035 mg/kg of THC reduced some THC-induced effects relevant to psychosis. Adding more CBD did not reduce how high people felt. In plain terms, one CBD ratio changed some of THC’s mind effects in that lab setting, but more CBD did not turn down the high. For the CBD side of this, read CBD benefits evidence (our research library).
Can delta 9 fail a drug test?
Whether a product is legal in your state and whether it shows on a test are separate questions. For detection windows and test types, read the delta 9 drug test guide. Then ask your employer or testing provider which test they run. For job questions, see can you get fired for weed.
Does THCa give you the same high as delta 9, and is THCa worth smoking?
Healthline says other forms of THC have chemical structures similar to delta-9, but their effects are usually different.
On smoking, Healthline’s advice is about cannabis in general. It says it’s best to avoid smoking or vaping, and to choose topicals, tinctures or edibles instead. It also says smoking and vaping can irritate the respiratory system, and cites 2018 research suggesting that smoking cannabis can cause bronchitis and raise the risk of COPD.
To find out what a specific THCa product contains, ask the seller for its lab report and look for THCa and delta-9 listed separately.
Delta 8 legal states and how delta 8 compares with delta 9
Healthline says delta-8 and delta-9 share the chemical formula C21H30O2, and the difference is where one carbon-carbon double bond sits. Both are intoxicating. Healthline says anecdotal accounts suggest delta-8 is less potent than delta-9, and that many delta-8 products are synthetic and may carry additional safety concerns. The O’Flaherty Law article calls delta-8 generally milder and says it is made by chemically altering CBD. For a fuller side-by-side, read delta 8 vs delta 9.
The O’Flaherty Law article sorts delta-8 states as follows.
| Delta-8 status | States listed |
|---|---|
| Explicitly allowed (26 states) | Alabama, Florida, Georgia, Illinois, Indiana, Kansas, Kentucky, Maine, Maryland, Massachusetts, Missouri, Nebraska, Nevada, New Jersey, North Carolina, Ohio, Oklahoma, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Virginia, West Virginia, Wisconsin, Wyoming |
| Not specifically banned | Arkansas, California, Mississippi |
| Banned or heavily regulated, per the O’Flaherty Law article | Alaska, Arizona, Colorado, Delaware, Idaho, Iowa, Minnesota, Montana, New York, North Dakota, Rhode Island, Utah, Vermont, Washington |
For a state-by-state delta-8 check, see is delta 8 legal in your state.
Delta 9 gummies: what to check before you buy
Healthline notes that edibles take longer to kick in than inhaled cannabis. It also says that if you’re new to cannabis, start with a low dosage and a product that is not very high in THC.
To compare products, see best delta 9 gummies. For a different format and dosing details, read the delta 9 syrup dosing review.
Delta 9 side effects and who should be careful
Healthline lists these effects of delta-9.
| Situation | What Healthline lists |
|---|---|
| Common and temporary | Dry mouth, increased appetite, memory loss, red eyes, slowed reaction times, rapid heart rate |
| Using too much THC | Feeling anxious, confused or dizzy |
| Rare, with high dosages | Hallucinations, paranoia and panic attacks, nausea and vomiting |
Healthline reports a 2020 review of 21 studies that found 22% of people who use cannabis develop cannabis use disorder. It also describes a 2022 systematic review linking cannabis use during the teen years to changes in brain development, with the authors calling for more high-quality research. Healthline says withdrawal symptoms are possible if you go from regular use to stopping.
Healthline suggests discussing THC with a doctor before use, especially if you hope to use it to treat a medical condition. For the wider safety picture, read cannabis, hemp and amanita safety.
How to buy delta 9 safely
Healthline advises buying only from reputable vendors. It says a third-party lab report is safer, and that you should be able to read it on the company’s website. Healthline also suggests asking how a product is grown or made, and which product suits the effects you want.
Before you order
- Check your state’s current cannabis law. Healthline and the O’Flaherty Law article both say these laws change often. For federal action, read the DEA marijuana regulatory actions page and the FDA cannabis regulation overview.
- Ask the seller which states it ships to, in writing.
- Ask for the third-party lab report for the batch you’re buying, and read it on the company’s website.
- Check today’s price directly with the seller, since prices and bundles change.
- Ask your employer or testing provider which drug test they use before you decide.
By HealthDataConsortium.org Research Team
This article is for general information purposes only and does not constitute medical advice. Consult your doctor or qualified healthcare provider before making changes to your health routine.
