Given its name, you might assume THCV shares psychoactive powers with its potent counterpart, THC. In reality, this cannabinoid is more like a cross between CBD and THC. From the former, it takes its modulating powers. Acting like THC “lite,” THCV like CBD can dampen the effects of a strong high. Yet at higher doses, THCV kicks into a psychoactive stimulant in its own right.
First, a little background. Industrial hemp was legal in the United States until Congress passed the Marihuana Tax Act in 1937. ("Some of our early presidents grew hemp," notes Sarah Lee Gossett Parrish, a cannabis industry attorney based in Oklahoma.) Nearly 80 years later, the 2014 Farm Bill took the position that states can regulate the production of hemp and, as a result, CBD. Then last year, President Trump signed a new Farm Bill that made it federally legal to grow hemp.
Cannabis is mostly used for recreation or as a medicinal drug, although it may also be used for spiritual purposes. In 2013, between 128 and 232 million people used cannabis (2.7% to 4.9% of the global population between the ages of 15 and 65).[28] It is the most commonly used illegal drug both in the world and the United States.[21][28] The countries with the highest use among adults as of 2018 are Zambia, the United States, Canada, and Nigeria.[29] In 2016, 51% of people in the United States had ever used cannabis.[30] About 12% had used it in the past year, and 7.3% had used it in the past month.[31]
^ Fusar-Poli, Paolo; Crippa, José A.; Bhattacharyya, Sagnik; Borgwardt, Stefan J.; Allen, Paul; Martin-Santos, Rocio; Seal, Marc; Surguladze, Simon A.; O'Carrol, Colin; Atakan, Zerrin; Zuardi, Antonio W.; McGuire, Philip K. (2009). "Distinct Effects of Δ9-Tetrahydrocannabinol and Cannabidiol on Neural Activation During Emotional Processing". Archives of General Psychiatry. 66 (1): 95–105. doi:10.1001/archgenpsychiatry.2008.519. PMID 19124693.
In a small study published in the journal JCI Insight in 2017, researchers observed that CBD may help prevent stress-related changes in blood pressure. For the study, nine healthy male volunteers took a single dose of either CBD or placebo. Compared to those given the placebo, those treated with CBD had lower blood pressure both before and after experiencing a stressful event.


The gateway effect may appear due to social factors involved in using any illegal drug. Because of the illegal status of cannabis, its consumers are likely to find themselves in situations allowing them to acquaint with individuals using or selling other illegal drugs.[268][269] Utilizing this argument some studies have shown that alcohol and tobacco may additionally be regarded as gateway drugs;[270] however, a more parsimonious explanation could be that cannabis is simply more readily available (and at an earlier age) than illegal hard drugs. In turn alcohol and tobacco are easier to obtain at an earlier point than is cannabis (though the reverse may be true in some areas), thus leading to the "gateway sequence" in those individuals since they are most likely to experiment with any drug offered.[261]

The leaves, stems, flower buds and extracts from the marijuana plant can be eaten, brewed in a tea or put into a tincture. It can also be vaporized using an e-cigarette pen. Yale University researchers surveyed 3,847 Connecticut high school students about this practice in a 2015 study that was published in the journal Pediatrics. The study found nearly one in five e-cigarette users also have vaporize cannabis or byproducts like hash oil using the device. 
Via CB1 receptor activation, THC indirectly increases dopamine release and produces psychotropic effects.[146] Cannabidiol (CBD) also acts as an allosteric modulator of the μ- and δ-opioid receptors.[147] THC also potentiates the effects of the glycine receptors.[148] It is unknown if or how these actions contribute to the effects of cannabis.[149]
In 1924, Russian botanist D.E. Janichevsky concluded that ruderal Cannabis in central Russia is either a variety of C. sativa or a separate species, and proposed C. sativa L. var. ruderalis Janisch, and Cannabis ruderalis Janisch, as alternative names.[48] In 1929, renowned plant explorer Nikolai Vavilov assigned wild or feral populations of Cannabis in Afghanistan to C. indica Lam. var. kafiristanica Vav., and ruderal populations in Europe to C. sativa L. var. spontanea Vav.[53][62] In 1940, Russian botanists Serebriakova and Sizov proposed a complex classification in which they also recognized C. sativa and C. indica as separate species. Within C. sativa they recognized two subspecies: C. sativa L. subsp. culta Serebr. (consisting of cultivated plants), and C. sativa L. subsp. spontanea (Vav.) Serebr. (consisting of wild or feral plants). Serebriakova and Sizov split the two C. sativa subspecies into 13 varieties, including four distinct groups within subspecies culta. However, they did not divide C. indica into subspecies or varieties.[48][64]
Along with its better-known counterpart, THC (delta-9-tetrahydrocannabinol, the chemical that produces the marijuana high), CBD is one of more than 400 compounds found in the oils of cannabis plant species, which include marijuana and hemp. Unlike THC, CBD will not make you high. That said, this doesn’t mean CBD is not at all psychoactive, as many assert, says Jahan Marcu, Ph.D., director of experimental pharmacology and behavior at the International Research Center on Cannabis and Mental Health in New York City: “CBD does change cognition. It affects mood, which is why people take it for anxiety. And some find that it makes them more alert.”
In the 1970s, President Nixon declared a “War on Drugs” and signed into law the Controlled Substances Act of 1970. This law established a set of banned drugs and created the Drug Enforcement Administration (DEA). It also unintentionally outlawed one of the world’s oldest domesticated crop, hemp. This not only led to the demise of hemp, but also an increased misconception of the plant.
Marijuana or cannabis is the most frequently consumed illicit drug worldwide and in the United States (Rouse 1996). Marijuana is a green or gray mixture of dried shredded flowers and leaves of the hemp plant Cannabis sativa. It is believed that many drug addicts often first experiment with marijuana using it as a stepping stone to more potent or ‘harder’ illicit drugs (Fergusson and Horwood 2000).
In 1925, a compromise was made at an international conference in The Hague about the International Opium Convention that banned exportation of "Indian hemp" to countries that had prohibited its use, and requiring importing countries to issue certificates approving the importation and stating that the shipment was required "exclusively for medical or scientific purposes". It also required parties to "exercise an effective control of such a nature as to prevent the illicit international traffic in Indian hemp and especially in the resin".[211][212] In the United States in 1937, the Marihuana Tax Act was passed,[213] and prohibited the production of hemp in addition to cannabis.
In Europe and Asia, hemp farming has been conducted for millennia. Although most countries ceased growing hemp after the second word war, some didn’t, including France, China, Russia, and Hungary, so that essential knowledge of how to grow and process hemp was maintained. When commercial hemp cultivation resumed in Canada in 1997, many farmers undertook to grow the crop without appreciating its suitability for their situation, or for the hazards of an undeveloped market. Hemp was often grown on farms with marginal incomes in the hopes that it was a savior from a downward financial spiral. The myth that hemp is a wonder crop that can be grown on any soil led some to cultivate on soils with a history of producing poor crops; of course, a poor crop was the result.
"Cannabinoids have been found to have antioxidant properties, unrelated to NMDA receptor antagonism. This new found property makes cannabinoids useful in the treatment and prophylaxis of wide variety of oxidation associated diseases, such as ischemic, age-related, inflammatory and autoimmune diseases. The cannabinoids are found to have particular application as neuroprotectants, for example in limiting neurological damage following ischemic insults, such as stroke and trauma, or in the treatment of neurodegenerative diseases, such as Alzheimer's disease, Parkinson's disease and HIV dementia.
Thermal Insulation. Thermal insulation products (Fig. 20, 21) are the third most important sector of the hemp industry of the EU. These are in very high demand because of the alarmingly high costs of heating fuels, ecological concerns about conservation of non-renewable resources, and political-strategic concerns about dependence on current sources of oil. This is a market that is growing very fast, and hemp insulation products are increasing in popularity. In Europe, it has been predicted that tens of thousands of tonnes will be sold by 2005, shared between hemp and flax (Karus et al. 2000).
Although hemp can be successfully grown continuously for several years on the same land, rotation with other crops is desirable. A 3- or preferably 4-year rotation may involve cereals, clover or alfalfa for green manure, maize, and hemp. In Ontario it has been recommended that hemp not follow canola, edible beans, soybeans or sunflowers. However, according to Bócsa and Karus (1998), “it matters little what crops are grown prior to hemp.”
The leaves have a peculiar and diagnostic venation pattern that enables persons poorly familiar with the plant to distinguish a cannabis leaf from unrelated species that have confusingly similar leaves (see illustration). As is common in serrated leaves, each serration has a central vein extending to its tip. However, the serration vein originates from lower down the central vein of the leaflet, typically opposite to the position of, not the first notch down, but the next notch. This means that on its way from the midrib of the leaflet to the point of the serration, the vein serving the tip of the serration passes close by the intervening notch. Sometimes the vein will actually pass tangent to the notch, but often it will pass by at a small distance, and when that happens a spur vein (occasionally a pair of such spur veins) branches off and joins the leaf margin at the deepest point of the notch. This venation pattern varies slightly among varieties, but in general it enables one to tell Cannabis leaves from superficially similar leaves without difficulty and without special equipment. Tiny samples of Cannabis plants also can be identified with precision by microscopic examination of leaf cells and similar features, but that requires special expertise and equipment.[12]
But herein lies a problem. The research needed to determine the correct dosage for CBD oil in dogs simply hasn’t been done yet, Coates says. And, to make matters worse, FDA testing has shown that many CBD products contain little if any CBD, she adds. The best option available to pet parents at this time is to talk to a veterinarian who has experience with pets being treated with cannabis oil about proper dosage and reputable manufacturers, Coates says.
It is often claimed by growers and breeders of herbal cannabis that advances in breeding and cultivation techniques have increased the potency of cannabis since the late 1960s and early '70s when THC was first discovered and understood. However, potent seedless cannabis such as "Thai sticks" were already available at that time. Sinsemilla (Spanish for "without seed") is the dried, seedless inflorescences of female cannabis plants. Because THC production drops off once pollination occurs, the male plants (which produce little THC themselves) are eliminated before they shed pollen to prevent pollination. Advanced cultivation techniques such as hydroponics, cloning, high-intensity artificial lighting, and the sea of green method are frequently employed as a response (in part) to prohibition enforcement efforts that make outdoor cultivation more risky. It is often cited that the average levels of THC in cannabis sold in the United States rose dramatically between the 1970s and 2000, but such statements are likely skewed because undue weight is given to much more expensive and potent, but less prevalent samples.[253]

CBD is derived from either hemp (the rope and fabric stuff) or cannabis (usually the recreational stuff). It can be easy to get, is purported to offer many health benefits for pets (and people), and comes in anything from pills and oils to specialty treats. Often, you will find CBD in the form of an oil that can be given orally, although there are other products like biscuits and capsules easily found online. Most importantly, it won’t get your dog high, which is good news for dogs because of their extreme sensitivity to THC. 

When THC is consumed, it binds to CB1 receptors in the brain, which is what causes users to get high, while still providing certain health benefits. But CBD does not directly bind to these receptors and instead indirectly interacts with the CB2 receptors that are found mainly in the immune system, though they (along with CB1 receptors) are also found throughout the body.
Fig. 2. Cannabis sativa. This superb composite plate by artist Elmer Smith, often reproduced at a very small scale and without explanation in marijuana books, is the best scientific illustration of the hemp plant ever prepared. 1. Flowering branch of male plant. 2. Flowering branch of female plant. 3. Seedling. 4. Leaflet. 5. Cluster of male flowers. 6. Female flower, enclosed by perigonal bract. 7. Mature fruit enclosed in perigonal bract. 8. Seed (achene), showing wide face. 9. Seed, showing narrow face. 10. Stalked secretory gland. 11. Top of sessile secretory gland. 12. Long section of cystolith hair (note calcium carbonate concretion at base). Reproduced with the permission of Harvard University, Cambridge, MA.
The psychoactive effects of cannabis are known to have a triphasic nature. Primary psychoactive effects include a state of relaxation, and to a lesser degree, euphoria from its main psychoactive compound, tetrahydrocannabinol. Secondary psychoactive effects, such as a facility for philosophical thinking, introspection and metacognition have been reported among cases of anxiety and paranoia.[94] Finally, the tertiary psychoactive effects of the drug cannabis, can include an increase in heart rate and hunger, believed to be caused by 11-OH-THC, a psychoactive metabolite of THC produced in the liver.

Cannabis consumers have long prized potency (a high THC content) as one of the main factors that makes a particular strain more desirable. Though traditional demand for THC has caused an oversaturation of high-potency products, many consumers are starting to prefer less intense products that are lower in THC and higher in the non-intoxicating compound called cannabidiol (CBD).
I have a cat with glaucoma diagnosed 1 month ago and on a prescribed eye drop 5ml Azopt Opht Susp. 1%. tid . The vet doesn’t think it will work for long. She is 17 and has heart murmur so thinks taking the eye would not be possible due to risk with murmur. Is it possible CBD will help that? How much liquid oil to give per lb? My CBD is 3.3MG/ML CBD in salmon oil. Farmacy brand. Trusted.
Most vets will agree that you should not give your dog an intoxicating amount of THC, the psychoactive ingredient in marijuana. There are plenty of reasons why, which you can learn about in “Marijuana, Cannabidiol & Dogs: Everything You Want (And Need) to Know.” The quick and dirty version is that dogs will not enjoy THC the same way you might (or do), and it can actually be dangerous. So is CBD better? Maybe. And that’s about the best information you’ll get out of most vets.
Menthol, CBD Infused Hemp Oil (Derived from Industrial Hemp), Purified Water, Isopropyl Alcohol, Mineral Oil, Stearic Acid, Propylene Glycol, Aloe Vera Gel, Triethanolamine, White Protopet, Dimethicone, Propyl Paraben, Methylparaben, Allantoin, Carbomer, Diazolidinyl Urea, Iodopropynyl Butylcarbamate Camphor, Organic Ilex, Phenoxyethanol, Methylparaben, Butylparaben, Ethylparaben, Isobutylparaben, Tea Tree Oil, Tocopherol Acetate (Vitamin E)
Recreational cannabis use centers around one chemical: the psychoactive cannabinoid tetrahydrocannabinol (THC). Consuming this chemical induces euphoric and stimulating sensations commonly referred to as a “high.” For most marijuana users, these sensations are pleasurable and enjoyable. For some, however, THC can induce feelings of anxiety and paranoia, especially in large doses.

In Europe and Asia, hemp farming has been conducted for millennia. Although most countries ceased growing hemp after the second word war, some didn’t, including France, China, Russia, and Hungary, so that essential knowledge of how to grow and process hemp was maintained. When commercial hemp cultivation resumed in Canada in 1997, many farmers undertook to grow the crop without appreciating its suitability for their situation, or for the hazards of an undeveloped market. Hemp was often grown on farms with marginal incomes in the hopes that it was a savior from a downward financial spiral. The myth that hemp is a wonder crop that can be grown on any soil led some to cultivate on soils with a history of producing poor crops; of course, a poor crop was the result.