The drugs are 10 times more dangerous than fentanyl. They are showing up in street drugs in the South and the Midwest, and will most likely spread to other regions.

Unusual opioids are infiltrating street drugs. Knoxville’s top forensic doctor is on the front lines, pressing to quickly identify the most lethal.

Three people aboard a cruise ship sailing the Atlantic Ocean have died from what health officials suspect were hantavirus infections.

One case of the infection has been confirmed in a laboratory, and there are five additional suspected cases, the organization said on Sunday.

For decades, conservatives were adamantly opposed to the use of drugs like psilocybin and LSD. Now, the Trump administration has made a sharp pivot.

Some screenings and treatments no longer make sense for patients as they age. Researchers have just added a few more to the list.

The court order, in a lawsuit by the state of Louisiana, pauses a Food and Drug Administration regulation that greatly expanded access to the abortion pill mifepristone.

Jenna Norton had filed a whistle-blower complaint claiming that the agency leadership had retaliated against her.

Patients with one of the deadliest cancers have been pleading for an unapproved treatment that may prolong their lives.

Americans can’t afford the higher health insurance premiums that resulted from Congress’s refusal to extend federal tax credits.

With Health Secretary Robert F. Kennedy Jr. aiming to rein in the use of psychiatric drugs, psychiatrists are preemptively addressing how and when patients should quit taking them.

Dr. Means’s nomination had stalled in part over her views on vaccines. The president said he was instead nominating Dr. Nicole B. Saphier, a radiologist at Memorial Sloan Kettering Cancer Center.

Dr. Sara Brenner is a physician, an F.D.A. official and a “MAHA mom” who has said people should not reflexively believe in the benefits of vaccines.