Tetrahydrocannabinol News and Research

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Vaporized cannabis increases drug-seeking behavior, study shows

Rats with regular access to cannabis seek more of the substance and tend to show increased drug-seeking behavior when cannabis is absent.

24 Mar 2020

UCLA researcher awarded NIH grant to study pain-relieving effects of cannabis chemicals

Ziva Cooper, research director of the UCLA Cannabis Research Initiative, has been awarded a $3.9 million grant from the National Center for Complementary and Integrative Health at the NIH to study whether cannabis chemicals called terpenes can reduce the amount of opioid medication a person needs to reduce pain.

18 Mar 2020

Study looks at lung injury and vaping THC and vitamin E acetate

The US has witnessed a spate of patients presenting with acute lung injury associated with e-cigarettes or vaping product use. A new study published in the journal JAMA Internal Medicine shows the pattern of the outbreak in California where recreational cannabis use is legal and which has among the maximum cases of the strange illness.

8 Mar 2020

How cannabis interacts with medications

A new practice guideline published in the journal CMAJ in February 2020 describes five types of drug interactions possible with the use of cannabis. Cannabis is a plant-derived drug containing the psychoactive ingredient delta-9-tetrahydrocannabinol (THC) and non-psychoactive cannabidiol (CBD). These cannabinoids are broken down by the liver enzymes cytochrome P450 C(YP)34A, and CYP2CC9.

2 Mar 2020

Researchers uncover hidden antibiotic potential of cannabis compound

Public health agencies worldwide have identified antibiotic resistance of disease-causing bacteria as one of humanity's most critical challenges. However, scientists haven't discovered a new class of antibiotics in more than 30 years.

26 Feb 2020

Research looks at prenatal cannabis use

More and more, pregnant women today are using cannabis, which is mostly for relieving stress and coping with mood changes. However, the risk associated with this for pregnant women who have mental ill-health or trauma is mostly unexplored.

19 Feb 2020

Common human gene variant linked to THC reward in adolescent females

A common variation in a human gene that affects the brain's reward processing circuit increases vulnerability to the rewarding effects of the main psychoactive ingredient of cannabis in adolescent females, but not males, according to preclinical research by Weill Cornell Medicine investigators.

12 Feb 2020

Marijuana use increases false memories finds study

A new study published this week has revealed that the use of marijuana or cannabis can implant false memories. The study titled, "Cannabis increases susceptibility to false memory," was published in the latest issue of the journal Proceedings of the National Academy of Sciences.

11 Feb 2020

Pulmonary imaging key to diagnosing vaping-related lung damage

In 2019, the emergence of mysterious lung disease in the United States has sparked global health attention. Now named as the e-cigarette, or vaping, product use–associated lung injury (EVALI), the disease causes lung damage, which is a serious and sometimes fatal complication of vaping.

28 Jan 2020

Study provides important insight into the recent lung intoxication epidemic

A new study published on 24 January 2020 in the journal Toxics provides important insight into the recent lung intoxication epidemic referred to as "e-cigarette or vaping product use-associated lung injury" (EVALI).

24 Jan 2020

Early vaping illness cases linked to vaping products containing vitamin E acetate

A new study published in January 2020 in the journal Toxics reports that a complete analysis of the products used by patients who fell ill after using vaping products shows one component standing out – vitamin E acetate (VEA). This was the outstanding component found in e-cigarette liquids containing cannabis compounds, but not in the nicotine-containing vaping liquids.

23 Jan 2020

Cannabis use disorder more common in adults with pain

A new study published in the journal American Journal of Psychiatry reports that the use of cannabis for non-medical indications is much more common in adults who have pain than in others. This includes those who use marijuana very often or heavily enough to be considered to have a problem with dependence.

22 Jan 2020

Cannabinoids can alleviate some symptoms of endometriosis

Initial results from treating endometriosis in mice with cannabinoids suggest they can alleviate some symptoms of the disease, according to a new study in the open-access journal eLife.

14 Jan 2020

Researchers identify how marijuana accelerates growth of HPV-related head and neck cancer

University of California San Diego School of Medicine researchers have identified the molecular mechanism activated by the presence of tetrahydrocannabinol (THC) - the ingredient that causes people to feel the euphoria or "high" associated with cannabis - in the bloodstream that accelerates cancer growth in patients with human papillomavirus (HPV)-positive head and neck squamous cell carcinoma.

13 Jan 2020

New sweat test could help detect a person’s marijuana-use

Forensic chemist Jan Halámek is proving that our own perspiration not only gives away how drunk we are – but if we are high, too.

6 Jan 2020

2,500 vaping-related hospitalizations in the US

Over the past few months, there was a sudden surge of patients presenting with mysterious lung disease, e-cigarette, or vaping, product use-associated lung injury (EVALI), which was tied to e-cigarette use. Now, the Centers for Disease Control and Prevention (CDC) reports more than 2,500 hospitalizations and a total of 54 deaths.

22 Dec 2019

New set of recommendations for clinicians to address youth vaping

In response to the pressing public health issue of vaping, clinicians of all disciplines are being asked to address this issue with youth, families and community members, despite minimal youth-focused screening or treatment guidelines.

19 Dec 2019

Bans restricting e-cigarette sales could do more harm than good, say experts

Bans and other policies restricting e-cigarette sales could do more public harm than good, according to a group of public-health, tobacco-policy and ethics experts.

13 Dec 2019

A woman has developed rare form of lung metal-scarring from vaping

A woman who had been vaping cannabis oil has been diagnosed with rare type of lung scarring usually only seen in metalworkers.

5 Dec 2019

Vitamin E acetate and vaping-induced lung injury

In a report posted early online in the Centers for Disease Control and Prevention’s Morbidity and Mortality Weekly Report (MMWR), scientists report that vaping products containing vitamin E acetate are apparently linked to the occurrence of lung injury in e-cigarette or vaping product users.

2 Dec 2019