Blockade of effects of exogenously administered opioids (oral)
How The Drug Works
Blocks mu opioid receptors, preventing alcohol or exogenous opioids from binding there and thus preventing the pleasurable effects of alcohol or opioid consumption
How Long Until It Works
Can begin working within a few days but maximum effects may not be seen for a few weeks
If It Works
Diminishes rewarding effects of alcohol or opioid consumption
Reduces cravings, decreases alcohol or opioid consumption
If It Doesn’t Work
Evaluate for and address contributing factors
Consider switching to another agent
Consider augmenting with acamprosate
Best Augmenting Combos for Partial Response or Treatment-Resistance
Acamprosate
Augmentation therapy may be more effective than monotherapy
Augmentation with behavioral, education, and/or supportive therapy in groups or as an individual is probably key to successful treatment
Tests
Urine screen for opioids and/or naloxone challenge test prior to initiating treatment for opioid use
None for use in treating alcohol dependence, although baseline liver function testing, usually obtained anyway for managing alcohol dependence, may be useful