The health secretary said he would prioritize studies into environmental causes while harshly discounting other factors scientists say are likely contributing to rising rates of the condition.

U.S. regulators are trying to shut down the industry for compounded weight-loss drugs, which could result in higher costs or suspend treatment for patients.

The devastating stimulant has been hitting Portland, Maine hard, even competing with fentanyl as the street drug of choice. Although a fentanyl overdose can be reversed with Narcan, no medicine can reverse a meth overdose. Nor has any been approved to treat meth addiction.Unlike fentanyl, which sedates users, meth can make people anxious and violent. Its effects can overwhelm not just users...

The highly addictive drug, manufactured almost exclusively by Mexican cartels, is more dangerous than ever. Its use has been surging across the country. Unlike fentanyl, there are no medicines that can swiftly reverse a meth overdose and none approved to treat meth addiction.

A powerful stimulant that keeps users sleepless for days and can ignite psychosis and violence has been rattling Portland and its safety networks.

President Trump directed his administration to help states import drugs from Canada. But a proposal to alter a Medicare program to reduce costs could wind up raising prices.

While the agency stressed that increased screening was most likely behind much of the increase, the health secretary, Robert F. Kennedy Jr., called it an “epidemic.”

In the first clinical trial of its kind, an A.I. chatbot eased mental health symptoms among participants. The technology may someday help solve the provider shortage.

Levies on Americans’ daily prescriptions and other medicines could raise costs, spur rationing and lead to shortages of critical drugs.

Funded by the maple industry, a researcher has exaggerated his findings to suggest that syrup could help prevent serious diseases.

Citing a national security statute, the administration has begun a process to investigate the impact of imported semiconductors and pharmaceuticals.

Users needing emergency care or hospitalization were at much greater risk of later dementia, researchers reported. That does not prove cannabis was the cause.

Scientists developed a way to freeze a large mammal’s kidney, which could ease organ shortages in the future. First, they had to see if their method would work in a pig.