If you're wondering whether dayquil can keep you awake, the answer is yes. Dayquil contains ingredients like pseudoephedrine and phenylephrine, which are known to cause sleeplessness. Dec 8, 2024 · no, dayquil does not contain caffeine. Its formulation is designed to provide daytime relief from cold and flu symptoms without the need for caffeine. Jul 23, 2023 · one of the primary concerns about taking dayquil at night is its potential impact on sleep quality.
In dayquil formulations that contain caffeine, this stimulant could potentially help someone feel more awake or alert for a short period after ingestion. However, the amount of caffeine varies.
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