nitrous oxide

Nitrous oxide, or laughing gas, has shown early promise as a treatment for severe depression in patients whose symptoms don’t respond to standard therapies, according to a small pilot study led by (from left) psychiatrists Charles R. Conway, MD, and Charles F. Zorumski, MD, and anesthesiologist Peter Nagele, MD, at the School of Medicine.

Nitrous oxide — best known as laughing gas — is one of the world’s oldest and most widely used anesthetics. Despite its popularity, however, experts have questioned its impact on the risk of a heart attack during surgery or soon afterward. But those fears are unfounded, a new study indicates.