adverse effects

An author correction is published for a study on a µ-opioid receptor superagonist analgesic with minimal adverse effects in the journal Nature. The study was published online on 24 April 2026 with the DOI 10.1038/s41586-026-10552-1.

Kratom, an herbal product, was banned in six U.S. states 18 months ago, with one state reversing its ban while others have advanced new restrictions. Reports of adverse effects, including deaths, linked to kratom have increased, prompting regulatory discussions.