Legalizing medical marijuana everywhere in the U.S. could save a lot of taxpayer dollars.

A study released in mid-April found if every state had allowed medical marijuana in 2014, it would have saved Medicaid more than $1 billion on prescription drugs.

Researchers compared the prices of Medicaid prescription drug spending in states with medical marijuana and those without.

Specifically, they looked at drugs used to treat ailments that marijuana could potentially treat.

In states that allowed medical marijuana, prescriptions for antidepressants went down 13 percent. Anti-nausea prescriptions dropped by 17 percent, psychosis and seizure prescriptions dropped by 12 percent, and pain prescriptions dropped by 11 percent.

Marijuana is still a Schedule I drug, which means the U.S. government considers it to have a high potential for addiction and doesn't recognize it for medical use.

Other drugs in that category include heroin, LSD and ecstasy.

But recent polls show a majority of Americans support legalizing marijuana.

Pot, medical or otherwise, has been especially criticized by Attorney General Jeff Sessions.

During a speech in March, he said he thinks the merits of medical marijuana have been hyped "maybe too much."