A member asked:

What's happens if you take day time sinus and night time sinus within two hours of each other?

3 doctors weighed in across 2 answers
Dr. answered

Twilight Sinus?: Probably nothing. The night time sinus just contains an antihistamine that helps you sleep. Just make sure you don't exceed the maximum daily dose recommendations.

Answered 3/2/2017

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Dr. Geoffrey Rutledge answered

Specializes in Internal Medicine

Jittery or drowsy: The medications in night time preparations usually include an antihistamine (causes drowsiness) in addition to acetaminophen (Tylenol) and a decongestant (EG, phenylephrine). Taking double the decongestant dose can make some people jittery. The extra acetaminophen isn't enough to cause a problem (but taking double the recommended dosage of acetaminophen over time can be toxic to the liver).

Answered 3/13/2017

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