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Soleno Therapeutics Presents New VYKAT® XR (diazoxide choline) Data at ENDO 2026 Demonstrating Meaningful and Durable Improvements in Hyperphagia and Behavioral Symptoms in Prader-Willi Syndrome Following Randomized Withdrawal Period

$NBIXPress releaseJun 15, 2026, 4:10 PM ETRead the release

Neurocrine Biosciences presented late-breaking Phase 3 data for VYKAT XR at ENDO 2026, demonstrating durable improvements in hyperphagia and behavioral symptoms in Prader-Willi syndrome patients. Patients who resumed treatment after a 16-week placebo withdrawal showed significant recovery of benefit, with HQ-CT scores improving by 6.3 points at two years, while continuous users maintained stable improvements.

Key figures

Drug Name
VYKAT XR (diazoxide choline)
Phase Of Trial
Phase 3
Mean age
15.3
Female percentage
55.8%
Study participants
77
Path participants control
229
Path participants treated
125
Path comparison year1 diff
6.2
Path comparison year2 diff
6.5
Path comparison year3 diff
6.2
Hq ct improvement restart 2yr
-6.3
Hq ct improvement continuous 2yr
-3.1
Hq ct improvement restart week13
-4.5
Hq ct improvement continuous week13
-2.7

AI analysis

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    NBIX: Soleno Therapeutics Presents New VYKAT® XR (diazoxide choline) Data at ENDO 2026 Demonstrating Meaningful and Durable Improvements in Hyperphagia and Behavioral Symptoms in Prader-Willi Syndrome Following Randomized Withdrawal Period — AI Analysis | Signal8