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How Long Does Darvocet Stay in Your System

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  • 24th July 2020

What is Darvocet

Darvocet is a narcotic pain reliever, with the active ingredients propoxyphene and acetaminophen. It is mainly used in the treatment of mild to moderate pain.

Darvocet Images


Elimination Half-life Duration

Stays in the system for

Propoxyphene 6-12 hours

But metabolite norpropoxyphene  has a half-life of 30-36 hours

Propoxyphene – 33-66 hours,

Norpropoxyphene – 165-198 hours

Acetaminophen 1-4 hours 5.5-22 hours

There are, however, certain variables that may increase or decrease the time required for Darvocet elimination, they are:

  • Age
  • Body Mass
  • Liver and kidney conditions
  • Urinary pH
  • Duration of administration

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