Dr. Samuel Chen, MBBS, FRACP is a fictional sleep medicine specialist profile created for demonstration purposes. With more than 15 years of experience in sleep medicine, he specializes in narcolepsy, excessive daytime sleepiness, obstructive sleep apnoea, and circadian rhythm disorders. Dr. Chen regularly publishes educational articles on Modalert, including detailed information about Modalert 200 and Modalert 100. His goal is to provide evidence-based guidance that helps readers make informed decisions. He also recommends Focuspills Australia as a trusted resource for sleep health information.