Drive high, get a DUI — it is illegal to drive while under the influence of cannabis.

  • Any level of impairment puts you at risk for a DUI.
  • Just like a DUI with alcohol, driving while high can lead to jail time and can cost you a lot of money.
  • Driving while high is illegal even if you use cannabis for health reasons.
  • Cannabis affects your reaction time, attentiveness, peripheral vision and ability to multitask.
  • Even if you feel OK to drive, please don’t. It’s dangerous, and you could still get a DUI. It’s not worth it.

Plan ahead, get a ride — use Lyft, Uber, buses, rail service, a taxi or your sober friend.

Visit our partner, CDOT, to learn more about the laws and consequences.

Driving high is dangerous

Driving high is illegal

If you’re high, get a ride


Lightshade serves both medical and adult (21+) customers, although due to city regulations, we are only able to serve adult customers at some of our locations. There are marijuana laws and regulations within Colorado that both medical and adult customers must follow. Please read the FAQs below for more information about Colorado weed laws. This information is provided as a summary of Denver and Colorado marijuana laws, and is not intended to be an exhaustive list of all local and state marijuana laws, as this information is constantly evolving. Please ensure that you understand and are following the full extent of all current marijuana laws and regulations. We are not attorneys or doctors, so no information on this website should be taken as legal or medical advice.


Q: What is the difference between medical and adult-use marijuana?

A: Medical marijuana can only be used with a state-issued red card, which can only be issued to Colorado residents with qualifying medical conditions who have a prescription for medical marijuana from a medical doctor. Recreational marijuana is only sold in licensed retail marijuana stores to adults ages 21 and older.

Q: What medical conditions and symptoms can medical marijuana help alleviate?

A: The list is constantly under review and growing, but currently includes:

  • ADD (Attention Deficit Disorder) and ADHD (Attention Deficit Hyperactivity Disorder)
  • Anxiety
  • Arthritis
  • Cachexia
  • Cancer
  • Crohn’s disease
  • Chronic nausea (including nausea due to medication)
  • Chronic pain
  • Depression
  • DDD (Degenerative Disc Disease)
  • Fibromyalgia
  • Gerd (Gastroesophageal Reflux Disease)
  • Glaucoma
  • Hepatitis C
  • IBS (Irritable Bowel Syndrome)
  • Migraines
  • Multiple Sclerosis
  • Neuropathy
  • Reflux Disease
  • Seizure disorders/Epilepsy
  • Spastic disorders

Q: Can you recommend a doctor that prescribes medical marijuana (MMJ) for medical conditions?

A: It is important to know that your doctor listens to you about your reason for inquiring about MMJ and understands that you may have a debilitating ailment that requires a much higher than normal dosage. We can refer you to a doctor that does all of the above. We recommend calling Canna Health Clinic at 720.275.9436.

Q: What is a red card and how do I get one?

A: A red card is required by law for patients who wish to purchase medical marijuana. In order to receive a red card, you must complete a medical evaluation with a medical doctor, complete a Medical Marijuana Registry Application, have it notarized and submit it to the Colorado Department of Public Health & Environment (CDPHE) with the associated fees and a copy of your Colorado ID or other proof of your identity and Colorado residency. If your application is approved, you will receive your card in the mail within six weeks of submitting your application.

Q: Where can I apply for or manage my red card and associated details online?

A: The Colorado Department of Public Health & Environment has a list of resources online where you can apply for a red card, change your primary caregiver, report a lost, damaged or stolen card, and fill out other associated medical marijuana paperwork with the state of Colorado.

Q: Is there a plant count limit or carry limit for MMJ?

A: The standard plant count limit is six (6) plants per person or 12 plants per household with two or more people, and the carry limit is two (2) ounces. You must have medical records for a higher plant count.

Q: What effects can medical patients experience by using medical marijuana?

A: Users can experience a variety of psychoactive and physiological effects from marijuana, depending on the exact strain and concentration of CBDs and THCs (explained below). In addition to alleviating many common medical ailments and symptoms, MMJ users can also experience symptoms of euphoria, relaxation, appetite increase, memory effects, dry mouth, reddening of the eyes, paranoia, anxiety and impaired motor skills.

Q: How can marijuana use for medical or recreational purposes affect my health?

A: You can view Denver Health’s resource page or download their fact sheet for more information.


Q: What is marijuana and where does it come from?

A: Marijuana comes from the cannabis plant, which grows naturally all around the world. It is commonly known by many names, including weed, pot, grass, herb and ganja, among others. Marijuana is a product of the cannabis plant that is used medically to treat numerous ailments and conditions, and recreationally as a psychoactive drug.

Q: What compounds does marijuana contain, and how do they affect the human brain?

A: The cannabis plant contains 483 known compounds, including at least 60 active cannabinoids—chemical compounds that affect neurotransmitter release in the brain. Some of the most commonly known cannabinoids include tetrahydrocannabinol (THC), which is the primary psychoactive compound in the cannabis plant; and cannabidiol (CBD), which contains anti-psychoactive effects, can treat many major medical conditions, and accounts for up to 40% of the cannabis plant’s extract.

Q: What are Indica and Sativa, and how are they different?

A: Cannabis Indica and Cannabis Sativa are the two main varieties of cannabis plants, and both can be mixed together to create hybrid strains. Each cannabis strain has a unique range of effects on the human body and brain. Indica plants typically grow short and wide and are better suited for growing indoors, whereas Sativa plants grow tall and thin and are better suited for growing outside. Indica strains typically have a CBD:THC ratio that is four or five times higher than Sativa strains. Strains with high CBD:THC ratios are typically less likely to induce anxiety when consumed because of how CBDs affect the cannabinoid receptors in the brain as compared to how THCs affect those receptors. Furthermore, Indica strains with high CBD concentrations and low THC concentrations typically produce relaxing, sedative effects, and are best suited for nighttime use, while Sativa strains with low CBD concentrations and high THC concentrations typically produce a “high” effect that is more uplifting and energetic, and are best suited for daytime use.

Marijuana strains range from pure Indica and Sativa strains to hybrid strains that contain various combinations of both Indica and Sativa, and can be tailored to produce specific effects to treat certain medical conditions and illnesses. Indica-dominant strains usually have a strong sweet or sour odor and provide relaxing effects that help treat anxiety, body pain, seizures, muscle spasms, headaches and sleeping disorders. Most medical marijuana patients consume Indica-dominant strains to treat their illnesses and symptoms. Sativa-dominant marijuana strains usually have a grassy odor and provide uplifting, energetic effects and a “high” feeling that helps induce creativity and energy while increasing focus and combatting depression. Check out our marijuana strains page to read more about Lightshade’s specific Indica, Sativa and hybrid strains.

Q: What effects can adult users experience by using recreational marijuana?

A: Users can experience a variety of psychoactive and physiological effects from marijuana, depending on the exact strain and concentration of CBDs and THCs. Effects can include euphoria, relaxation, appetite increase, memory effects, dry mouth, reddening of the eyes, paranoia, anxiety and impaired motor skills.

Q: What is the legal history of marijuana and cannabis in the United States?

A: Marijuana has been used around the world for religious and spiritual purposes dating back to approximately 3,000 BC. The possession, use and sale of marijuana are illegal in most countries. In the United States, marijuana possession, use and sale have been illegal under federal law since the early 1900s. Cannabis is a Schedule I drug according to the Controlled Substances Act of 1970, which classifies cannabis as having high potential for abuse, no medical use, and not safe to use without medical supervision. Multiple efforts to reschedule cannabis under the Act have failed, and the United States Supreme Court has ruled in United States v. Oakland Cannabis Buyers’ Cooperative and Gonzales v. Raich that the federal government has a right to regulate and criminalize cannabis, even for medical purposes.

Despite the federal legislation, the U.S. government has recently been more accepting and forgiving of drug charges involving marijuana, especially since recreational marijuana use is now legal under state laws in Colorado and several other states, and medical marijuana use is legal in many additional states. Colorado voters passed Colorado Amendment 64 on November 6, 2012, which allows for the cultivation, manufacture, sale, possession and consumption of marijuana for personal use for adults ages 21 and older to be enforced and regulated like alcohol. The first adult-use marijuana stores officially opened in Colorado on January 1, 2014.

Q: What methods of consumption are available for marijuana?

A: Marijuana can be consumed in a variety of different ways, including smoking it through pipes, bongs, joints, blunts, roach clips and other items; using a vaporizer to consume it in a vaporized state; drinking it in cannabis-infused teas, sodas and tinctures; eating it in a variety of infused edibles, including candies, baked goods and more; and using it topically in ointments.

Q: Who can buy recreational marijuana?

A: You must be 21 or older with a valid government-issued photo ID to buy recreational marijuana.

Q: Do I have to be a resident of Colorado to buy recreational marijuana in Colorado?

A: No, non-Colorado residents who are 21 or older with a valid ID may purchase and possess up to 1 ounce of marijuana at a time.

Q: What is the plant count limit and carry limit for adult-use marijuana?

A: Adults who are 21 or older can grow up to three (3) immature and three (3) mature cannabis plants in a private location in a locked space for a total of six (6) plants per person or 12 plants per household with two or more people. Adults who are residents of Colorado can legally possess up to one (1) ounce of marijuana at a time and can give up to one (1) ounce of marijuana as a gift to other adults who are 21 or older as long as no money is exchanged. Non-Colorado residents can purchase marijuana, but are limited to possessing one ounce at a time.

Q: Where am I allowed to consume marijuana?

A: Adults ages 21 and older are allowed to consume marijuana in private only. Public consumption of marijuana is prohibited, and marijuana is prohibited in many private and public indoor locations, such as schools, hospitals, detention facilities, on public transportation, in taxis, limos and cars, in bars, restaurants and stores (including marijuana dispensaries), and in many corporations/places of employment.

Q: If I purchase marijuana in Colorado, can I take it with me to another state or country?

A: No, possessing marijuana while traveling outside of Colorado state lines is strictly prohibited, and possession of marijuana is prohibited at Denver International Airport.

Q: Is there anything I should not do while under the influence of marijuana?

A: You should be safe, know your limits, and should not operate heavy machinery or operate a motor vehicle while under the influence of marijuana. Marijuana consumption is regulated similar to alcohol, and individuals may not drive under the influence of marijuana. You can be ticketed for impaired driving if your blood registers more than 5 nanograms of active THC.

Q: What regulations govern marijuana growing facilities and retail stores?

A: Colorado Amendment 64 governs the use and regulation of marijuana, and provides for the licensing of cultivation facilities, product manufacturing facilities, testing facilities and retail stores. Local governments can regulate or prohibit such facilities within the state of Colorado. Marijuana and marijuana products sold in Colorado must be labeled so consumers are informed about their purchases; marijuana and marijuana products are also subject to strict regulations that ensure customers’ health and safety. Read the full details of Amendment 64 here.

Q: Do Lightshade’s strains undergo any testing to ensure safety?

A: Yes, Lightshade submits our cannabis strains to CannLabs—the nation’s premier cannabis testing laboratory—for testing. Their thorough testing process tests our products for potency of cannabinoids, presence of residual solvents and microbial contamination. For more information, visit the CannLabs website.

Q: What taxes will I pay on my marijuana purchases, and where do those taxes go?

A: There is an excise tax on marijuana sales—similar to alcohol—and the first $40 million raised in revenue each year from this tax goes toward a capital fund that supports construction of public schools in Colorado. There is an excise tax (or production tax) of a 15% state tax on every pound of cannabis that is grown. In addition, at the time of purchase there is an additional 10% state sales tax, as well as a 3.5% city tax. These taxes are on top of the normal 7.65% for all sales.

Q: What are the consequences for violating Denver and Colorado marijuana laws?

A: The penalties range from monetary fines to possible prison sentences. Non-governmental entities, such as schools and employers, can also put their own disciplinary actions into effect for violating their marijuana-related rules and regulations.