March 3, 2025 — Genentech, a member of the Roche Group, recently announced that the U.S. Food and Drug Administration (FDA) has approved TNKase (tenecteplase), a thrombolytic or clot-dissolving agent, for treating acute ischemic stroke (AIS) in adults. This approval is Genentech’s second approval for stroke, and the company is now the developer of the only two FDA-approved medicines for AIS, TNKase and Activase (alteplase).
TNKase is delivered as a single five-second intravenous (IV) bolus, a faster and simpler administration compared to the standard-of-care, Activase, which is administered as an IV bolus followed by a 60-minute infusion. Genentech also will be introducing a new 25 mg vial configuration in the coming months to support the approval of TNKase for AIS.
“Today’s approval is a significant step forward and underscores our commitment to advancing stroke treatment options for patients,” said Levi Garraway, M.D., Ph.D., Genentech’s chief medical officer and head of Global Product Development. “TNKase provides a faster and simpler administration, which can be critical for anyone who is dealing with an acute stroke.”
Stroke is the fifth leading cause of death, and the leading cause of long-term disability in the United States, affecting more than 795,000 people each year. During an AIS, brain damage occurs and progresses rapidly, meaning every moment without intervention leads to irreversible loss of nervous tissue, making immediate medical care crucial.
The approval is based on a large multi-center non-inferiority study demonstrating that TNKase is comparable to Activase in AIS patients in terms of safety and efficacy. The AcT (Alteplase compared to Tenecteplase) trial compared TNKase to Activase in treating patients with acute ischemic stroke who presented with a disabling neurological deficit. This investigator-initiated study was conducted by the University of Calgary, was funded by the Canadian Institute of Health Research, and enrolled patients across 22 stroke centers in Canada.
TNKase is also FDA-approved for the treatment of acute ST-elevation myocardial infarction (STEMI) in adults.
For more information, go to https://www.tnkase.com.
December 01, 2025 
