How Long Does Phenergan Stay in Your System?

Answer

Phenergan has a half life of about sixteen to nineteen hours. This means it may only take a few days for the drug to remain in your system before it is entirely removed. This time-frame is quite common for drugs such as Phenergan.
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Phenergan (promethazine): Dosage
Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. Take your doses at regular intervals. Do not take your medicine more often than directed. Talk to your pediatrician regarding the use of this More »
Source: healthline.com
Q&A Related to "How Long Does Phenergan Stay in Your System?"
The length of time any drug will stay in your systems depends on several things. Such as your weight and height and the type of drug you use. How often you use the drug and the amount
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Half-life The half-life of a drug is the time it takes for the peak level of the medication available in the bloodstream to be reduced to half its original strength. The level continues
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The half-life of clonazepam (Klonopin) is about 30 hours. If you only take one dose, the general rule is the medication will statistically be out of your system after 5 half-lives
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Around 72 hours since your last dose. Even if it's the only dose.
http://wiki.answers.com/Q/How_long_opana_stays_in_...
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