Disulfiram (Antabuse) Dosing
The standard dosing for disulfiram is an initial dose of 500 mg daily for 1-2 weeks, followed by a maintenance dose of 250 mg daily (range 125-500 mg), with a maximum of 500 mg daily 1.
Initial Dosing Schedule
- Start with 500 mg daily as a single dose for 1-2 weeks
- Patient must abstain from alcohol for at least 12 hours before first dose 1
- Usually taken in the morning, but can be taken at bedtime if sedation occurs
- Dose may be adjusted downward to minimize sedative effects 1
Maintenance Dosing
- Average maintenance: 250 mg daily (range 125-500 mg)
- Maximum dose: 500 mg daily 1
- Continue daily, uninterrupted administration until full social recovery and permanent self-control is established
- Duration may be months to years depending on individual patient 1
Critical Contraindication
Disulfiram is NOT recommended for patients with alcohol-associated liver disease (ALD) 2. The 2020 American Association for the Study of Liver Diseases guidelines explicitly state that disulfiram undergoes hepatic metabolism and can cause liver damage, making it unsuitable for this population 2.
Dosing Nuances from Research Evidence
While the FDA label specifies 500 mg maximum, older research suggests some patients may require higher doses:
- Research from the 1980s-90s found that 200 mg daily was often inadequate, with only half of patients producing significant alcohol-disulfiram reactions at 200-300 mg 3
- Some studies reported patients needing up to 1.5 g daily, though this exceeds current FDA recommendations 3
- A 1991 dose-response study found 200 mg produced substantial reactions in most volunteers, with some requiring 300 mg 4
However, current FDA-approved dosing should be followed, with maximum 500 mg daily 1.
Important Clinical Considerations
Food effects: Recent pharmacokinetic data shows that taking disulfiram with a high-fat meal increases exposure to metabolites by approximately 100% for Me-DDC and 50% for Me-DTC 5. Consider consistent timing relative to meals.
Compliance monitoring: Patients may dispose of tablets without taking them. Supervised administration (preferably crushed and mixed with liquid) dramatically increases compliance and efficacy 1, 6.
Patient selection: Disulfiram works best as adjunctive therapy in structured treatment programs, not as monotherapy. Most effective in older, socially stable, well-motivated patients with supervised compliance 7, 6.
Duration: Therapy must continue until social recovery and self-control are established—this may require months to years 1.