It totally depends on the dosage of DXM. Low doses may be wore off within 2-3 hours. A high dosage that 400+ mg will last in the 6 hour range. Some may linger for over 12, depends on the dose and the person
Coricidin will not show up on a drug test, if that's what you're worried about. It's simply cough medicine. The high will last 5 hours though.
About an hour, and It lasts for 5 hours after that.
Coricidin hbp can stay between four to six hours in your urine
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