Clinical Trial 43397

Glendale, AZ 85306


Study Summary:

The Sparkle 2001 Study for Obstructive Sleep Apnea

Excessive daytime sleepiness associated with obstructive sleep apnea presents daily challenges and frustrations. You may struggle with activities that others take for granted, such as working, driving, and watching television. Even spending time with family and friends can be difficult when you’re constantly fighting to stay awake.

Further research is essential to learn more about treating sleep disorders. More treatment options are needed so they can be effective for more people.

What is the purpose of the Sparkle 2001 Study?

This clinical study is testing an investigational drug (TAK-925) to see if it could potentially be a safe and effective way to help increase wakefulness for people with obstructive sleep apnea who experience excessive daytime sleepiness. Is study participation an option for me?

You may qualify if you:

  • Are 18–67 years old
  • Have been diagnosed with obstructive sleep apnea
  • Experience excessive daytime sleepiness despite using CPAP
  • Go to bed between 9 pm and midnight and get at least 6.5 hours of sleep nightly
  • Meet additional requirements as determined by a screening process

You will be reimbursed for your time and travel. A study doctor and staff can explain to you in greater detail other requirements and eligibility criteria you would have to meet in order to participate in the study.




Clinical trials are medical research studies designed to test the safety and/or effectiveness of new investigational drugs, devices, or treatments in humans. These studies are conducted worldwide for a range of conditions and illnesses. Learn more about clinical research and participating in a study at About Clinical Trials.