Norflex (orphenadrine) & Valium?: These two drugs should only be prescribed by an MD In very specific cases, as they are both CNS depressants. valium ( a benzodiazepine) has a half life of 12 - 24 hrs, which means is takes 12 -24 hours for the amount in your blood stream to reduce by half. Norflex (orphenadrine) has a 16 h half life, so again, it will take 16 hours for half of the amount in your bloodstream to be eliminated.
Answered 4/7/2016
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