Tetrahydrocannabinol News and Research

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Marijuana edibles carry risk and side effects for patients with cardiovascular disease

As marijuana legalization sweeps North America, use of the substance has been on the rise, and the public's attitude is shifting. An increasing number of people believe that "weed" is the safest recreational drug, one that carries health benefits that outweigh its risks.

11 Feb 2019

Medical cannabis relieves ASD symptoms in children

In a new study of patients with autism who are 18 years old and under, researchers from Ben-Gurion University of the Negev and Soroka University Medical Center report that cannabis as a treatment for autism spectrum disorders appears to be a well-tolerated, safe and effective option to relieve symptoms including seizures, tics, depression, restlessness, and rage attacks.

31 Jan 2019

Highly effective protocol to prepare cannabis samples for THC/CBD analysis

Porvair Sciences describes how to use its Plant Genomics microplate for preparing cannabis samples for analysis of Tetrahydrocannabinol and Cannabidiol.

From Porvair Sciences Limited 17 Jan 2019

One time use of Marijuana could affect teen brains finds study

A survey from 2018 had found that 2.1 million students from middle and high schools have smoked marijuana at least once. A new study looked at the effects of marijuana or cannabis on the brains of adolescents.

15 Jan 2019

Exposure to cannabis, stress during adolescence may lead to long-term anxiety disorders

A new study conducted on laboratory animals shows that exposure to cannabis and stress during adolescence may lead to long-term anxiety disorders characterized by the presence of pathological fear.

8 Jan 2019

Study reveals increase in potency and price of cannabis across Europe

Cannabis resin and herbal cannabis have significantly increased in potency and in price, according to the first study to investigate changes in cannabis across Europe.

2 Jan 2019

Research explores effects of cannabis use on males’ reproductive health

As legal access to marijuana continues expanding across the U.S., more scientists are studying the effects of its active ingredient, tetrahydrocannabinol (THC), in teens, adults and pregnant women.

19 Dec 2018

Mouse study uncovers how marijuana may damage some adolescent brains

In a study of adolescent mice with a version of a gene linked to serious human mental illnesses, Johns Hopkins Medicine researchers say they have uncovered a possible explanation for how marijuana may damage the brains of some human teens.

18 Dec 2018

Study: Cannabidiol may worsen glaucoma, increase eye pressure

One of the most commonly proposed uses of medical marijuana is to treat glaucoma.

18 Dec 2018

Study of infrequent cannabis users compares adverse effects of vaping and smoking

In a small study of infrequent cannabis users, Johns Hopkins Medicine researchers have shown that, compared with smoking cannabis, vaping it increased the rate of short-term anxiety, paranoia, memory loss and distraction when doses were the same.

4 Dec 2018

Consumption of hemp-containing foods can lead to exceedance of acute reference dose

On the basis of the available data, the BfR comes to the following conclusion: the consumption of hemp-containing foods with the total -Δ9-tetrahydrocannabinol (THC) levels on which the calculation is based can lead to an exceedance of the acute reference dose (ARfD) of 0.001 milligrams (mg) per kilogram body weight proposed by EFSA.

29 Nov 2018

Study evaluates second-hand marijuana smoke exposure among children

In a study designed to evaluate second-hand marijuana smoke exposure among children--a topic that scientists have not yet widely addressed--researchers at the Icahn School of Medicine at Mount Sinai found that nearly half of children whose parents smoked marijuana showed evidence of second-hand marijuana smoke exposure.

20 Nov 2018

Effective dose of cannabidiol for safe pain relief without the typical 'high'

In the wake of cannabis legalization, a team of scientists at the Research Institute of the McGill University Health Center and McGill University have delivered encouraging news for chronic pain sufferers by pinpointing the effective dose of marijuana plant extract cannabidiol for safe pain relief without the typical "high" or euphoria produced by the THC.

25 Oct 2018

Cannabis oil shown to significantly improve Crohn’s disease symptoms

In the first study of its kind, cannabis oil has been shown to significantly improve the symptoms of Crohn’s disease and the quality of life of sufferers but, contrary to previous medical thinking, has no effect on gut inflammation.

23 Oct 2018

Cannabinoid drugs reduce perceived unpleasantness of painful stimuli and increase tolerance

Researchers in the College of Arts and Sciences have determined that cannabinoid drugs do not appear to reduce the intensity of experimental pain, but, instead, may make pain feel less unpleasant and more tolerable.

19 Sep 2018

Novel clinical trial to examine cannabis as potential treatment for essential tremor

Researchers at University of California School of Medicine are preparing to launch a novel clinical trial to examine the safety, efficacy and pharmacological properties of cannabis as a potential treatment for adults with essential tremor.

18 Sep 2018

Day-tripping to the dispensary: Seniors in pain hop aboard the canna-bus

Shirley Avedon, 90, had never been a cannabis user. But carpal tunnel syndrome that sends shooting pains into both of her hands and an aversion to conventional steroid and surgical treatments is prompting her to consider some new options.

18 Sep 2018

Medical marijuana may alter brain connections to provide relief from chronic nerve pain

When medical marijuana is taken for chronic nerve pain, it may provide pain relief by reducing connections between the areas of the brain that process emotions and sensory signals, according to a study published in the September 5, 2018, online issue of Neurology, the medical journal of the American Academy of Neurology.

6 Sep 2018

Scientists shed light on how dangerous inflammations are caused in the brain

The so-called CB1 receptor is responsible for the intoxicating effect of cannabis. However, it appears to act also as a kind of “sensor” with which neurons measure and control the activity of certain immune cells in the brain.

31 Aug 2018

Single dose of cannabidiol showed effective results in rats with symptoms of depression

Commercial antidepressants typically take two to four weeks to have a significant effect on a depressed patient. They are also inneffective in approximately 40% of the cases.