Judging only by that article, I'd say: Not generally. Its described as inhibiting REM sleep, not sleep or sleepiness in general.

Ask a doctor to help you figure this out. Wild guess, as a random layperson on the internet with no formal qualification: Could be lack of vitamins (E, D3, B5 or B6) or a melatonin insufficiency or a irregular sleep schedule or due to psychological causes. Alcohol and other drugs have quite the impact (especially in sleep quality). Or a combination or something completely different; it's like asking "My program is slow, what can I do?" ;-)