The treatment has been linked to seven deaths, largely due to heart or respiratory problems. It has also been associated with over 100 serious adverse events in Prader-Willi patients, raising safety and sales concerns.

7 deaths and over 100 serious adverse events reported to FDA after treatment with Vykat XR

Reports of serious adverse events and deaths linked to Neurocrine's VYKAT XR for Prader-Willi syndrome prompt caution.