Make us your home page

Today’s top headlines delivered to you daily.

(View our Privacy Policy)

PolitiFact Florida | Tampa Bay Times
Sorting out the truth in state politics

PolitiFact Florida: Is marijuana 'less toxic' than alcohol?

A Marijuana Policy Project ad claims marijuana is less harmful than alcohol. Science and statistics present a strong case.


A Marijuana Policy Project ad claims marijuana is less harmful than alcohol. Science and statistics present a strong case.

Just as fans were filing into the Brickyard 400 NASCAR race last month, a big screen by the entrance displayed a pro-pot ad with the headline "A new beer?"

"If you're an adult who enjoys a good beer," the ad said, "there's a similar product you might want to know about, one without all the calories and serious health problems. Less toxic so it doesn't cause hangovers or overdose deaths. And it's not linked to violence or reckless behavior. Marijuana. Less harmful than alcohol and time to treat it that way."

An effort is currently under way in Florida to get a proposed medical marijuana constitutional amendment on the 2014 ballot. People United for Medical Marijuana has collected enough voter signatures to trigger a Florida Supreme Court review of the proposed amendment language.

So is marijuana "less toxic" than alcohol?

"I don't see how this could be a more open-and-shut case," Mason Tvert, communications director for the Marijuana Policy Project, which produced the ad, told PolitiFact Florida in an email. "If you consume too much alcohol in a sitting or over the course of your life, you can die. If you consume too much (marijuana) in a sitting or over the course of your life, you do not die. What more could be needed to prove marijuana is 'less toxic' than alcohol?"

Some health professionals say it's a matter of picking your poison.

"It's like trying to compare different weapons. Both have the potential to cause harm," said Dr. Scott Teitelbaum, professor and vice chairman of the Department of Psychiatry and chief of the Division of Addiction Medicine at the University of Florida. "I don't know that there's a clear answer."

For starters, the term toxic can be vague. Dr. Cynthia Lewis-Younger, medical director of the Florida Poison Information Center in Tampa, said toxic can be "anything that causes harm. It is possible to drink enough water to poison yourself. It's more related to the dose than anything else."

The Marijuana Policy Project's claim that marijuana is "less toxic" rankles some health professionals and antidrug organizations who criticize the inference that using the drug is okay.

Calvina Fay, executive director of the Drug Free America Foundation, said she wants the public to realize that "these are two drugs that are both addictive and impairing and they both create unsafe situations."

Briefly, here's a look at how the National Institute on Drug Abuse describes each.

Alcohol is produced by the fermentation of yeast, sugars and starches and while it may start as a stimulant in small doses, NIDA describes it as a central nervous system depressant that is rapidly absorbed from the stomach and small intestine into the bloodstream. Intoxication can impair brain function and motor skills, and heavy use can increase the risk of certain cancers, stroke and liver disease.

Marijuana is a dry, shredded green and brown mix of leaves, flowers, stems and seeds from the hemp plant Cannabis sativa. The main psychoactive (mind-altering) chemical in marijuana is delta-9-tetrahydrocannabinol, or THC. When marijuana is smoked, THC rapidly passes from the lungs into the bloodstream, which carries the chemical to the brain and other organs.

Activists on both sides can find studies to back up claims about the health impact of weed.

NIDA states in an email that the effect of marijuana can depend on the biology of the person who's using it, the amount and under what circumstances.

"Claiming that marijuana is less toxic than alcohol cannot be substantiated since each possess their own unique set of risks and consequences for a given individual," according to an agency email statement.

Statistics certainly paint a grim picture of the lethal impact of alcohol abuse.

The Centers for Disease Control's National Center for Health Statistics reports that there were 41,682 deaths attributed to alcohol in 2010, the last year with the most exact statistics. That breaks down to 15,990 deaths attributed to alcoholic liver disease and 25,692 other alcohol-induced deaths, excluding accidents and homicides. The center doesn't have any reports with marijuana listed as a cause of death.

"Alcohol in excess is probably the No. 1 cause of toxicities from drugs of abuse in the world simply because it's most widely used," Lewis-Younger said.

Robert Gable, a retired professor of psychology at Claremont Graduate University in California, compared the toxicity of 20 abused substances using reports of experimental human and animal research and on published data of overdose fatalities.

He compared the drugs by developing a safety ratio — the ratio of an effective dose (eliciting a "relaxed affability") to a lethal dose.

"Two drinks make you buzzy; 20 drinks put you in the emergency room or the morgue," Gable said in a phone interview. "Ten is the safety ratio" for alcohol, among the most toxic recreational drugs, he said. The least physiologically toxic substances — those requiring 100 to 1,000 times the effective dose to cause death — included marijuana when ingested. He couldn't find any cases of documented deaths from smoked marijuana "so the actual dose is a mystery."

"No drug is good for teenagers," he said, "but when it comes to the chances of immediate death by chemical toxicity, marijuana is about a hundred times less toxic than alcohol or cocaine."

Experts say one concern is the impact of marijuana on the brain, particularly for teens who start smoking early. Teitelbaum says marijuana can "flip" adolescents predisposed to mental problems into having a psychotic disorder.

Another concern in recent years: the use of synthetic marijuana, often called Spice. Health professionals caution that it's vastly different from natural marijuana and more toxic.

Synthetic marijuana, however, is not marijuana.

Our ruling

An ad from the Marijuana Policy Project claims marijuana is "less toxic" than alcohol. Science and statistics present a strong case.

We rate this claim Mostly True.

Edited for print. Read the full version at

The statement

Says marijuana is "less toxic" than alcohol.

Marijuana Policy Project, in a TV ad

The ruling

Politifact ruling: Mostly true
Science and statistics present a strong case. We rate this claim Mostly True.

PolitiFact Florida: Is marijuana 'less toxic' than alcohol? 08/25/13 [Last modified: Sunday, August 25, 2013 10:47pm]
Photo reprints | Article reprints

© 2017 Tampa Bay Times


Join the discussion: Click to view comments, add yours

  1. Estimated 5,000 people marvel at MOSI over solar eclipse

    Human Interest

    Packing pinhole cereal box viewers, cardboard glasses and curiosity, solar gawkers gathered outside Tampa's Museum of Science and Industry on Monday for a show that required no ticket.

    At center, Sophia Butter, 8, and Kristina Butera, both of Valrico, watch the sun through eclipse viewing glasses during a solar eclipse party Monday at the Museum of Science and Industry in Tampa. MOSI will reopen after renovations on November 18. [MONICA HERNDON   |   Times]
  2. Florida State sees plenty of upside in Dade City native Jacob Pugh


    TALLAHASSEE — No, Florida State senior Jacob Pugh is not as versatile as teammate Derwin James.

     Florida State Seminoles linebacker Jacob Pugh (16) and Florida State Seminoles defensive end DeMarcus Walker (44) celebrate after sacking the Miami quarterback Saturday October 8, 2016 at Hard Rock Stadium in Miami Gardens.
  3. Tampa officer treated for knee injury after police truck, police SUV collide


    Times staff

    TAMPA — A Tampa police officer was treated and released for a knee injury when his unmarked police truck collided with a patrol SUV while the officers were tracking a stolen car, a police spokesman said.

  4. Waiting for the eclipse: 'Everyone thinks this is cool'

    Human Interest

    ST. PETERSBURG — Hunter Holland came to school Monday with a NASA space T-shirt and solar viewers in his button-up shirt pocket. But he'd rather be in Missouri.

    Jayda Hebert (front, center), 11, uses her protective glasses to watch Monday's solar eclipse with her cousin, Judah Adams (back left), 11, and her brother Jake Hebert (right), 9, while with their family at St. Petersburg Beach. "We're skipping school for the eclipse," her mom, Sarah Hebert, said. [DIRK SHADD   |   Times]
  5. Second person resigns from Hillsborough diversity council after Confederate activist appointed


    TAMPA — A second person has resigned symbolically from the Hillsborough County Diversity Advisory Council after the appointment of a known activist of Confederate causes to the panel. 

    Two people have resigned from the Hillsborough County Diversity Advisory Council after the inclusion of David McCallister, a leader of the local branch of the Sons of Confederate Veterans.