13 Biotech Stocks with Huge Upside Potential

5. Jazz Pharmaceuticals plc (NASDAQ:JAZZ)

Analysts’ Upside Potential as of June 9: 62.69%

Jazz Pharmaceuticals plc (NASDAQ:JAZZ) is one of the stocks with the biggest upside. It presented late-breaking Phase 4 data on Xywav® at SLEEP 2025, which included findings from the XYLO and DUET trials.

In the XYLO study (n=43), moving from high-sodium to low-sodium oxybate resulted in a substantial decrease in 24-hour ambulatory systolic blood pressure (−4.1 mmHg; P=0.0019). SBP reduction during the day (−5.1 mmHg; P=0.0003) and while seated (−9.2 mmHg; P<0.0001) were secondary objectives.

The TEAEs were moderate or mild. DUET data from 24 subjects taking 9-12g Xywav nightly displayed improvement in excessive daytime sleepiness and narcolepsy severity with an average dose of 11.2g during the stable period.

Xywav is the sole FDA-approved low-sodium oxybate for cataplexy or EDS in narcolepsy and idiopathic hypersomnia. Xywav reduces nightly sodium intake by up to 92% compared to Xyrem®, lowering cardiovascular risk, which is a serious issue in narcolepsy patients. Both indications were awarded Orphan Drug Exclusivity by the FDA.

Jazz Pharmaceuticals plc (NASDAQ:JAZZ)’s data underscores how crucial it is to lower sodium intake in long-term sleep disorder treatment plans.