Merck & Co Resumes Islatravir HIV Studies After Safety Concerns, But Abandons PrEP Approach

Maintains Belief In Oral Long-Acting Regimen

After a nine-month US FDA-imposed pause, Merck is relaunching its studies of islatravir with a lower dose, while also abandoning its use in PrEP studies.

Merck
Merck is trying to get its long-acting HIV program back on track, but is lagging behind GSK and Gilead • Source: Shutterstock

Following safety concerns which halted studies last year, Merck & Co has been given the go-ahead to re-start some trials of its oral HIV combination regimen of its investigational antiretroviral, islatravir, and Gilead’s capsid inhibitor, lenacapavir, which had been put on hold or partial hold.

Like other companies in the field, Merck is looking to develop HIV maintenance therapies that can be taken less frequently...

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