What is the equivalent oral diazepam dose for bromazepam 6 mg and how should the medication be switched?

Bromazepam 6 mg to Diazepam Conversion

Bromazepam 6 mg is approximately equivalent to diazepam 10 mg based on clinical trial data, though a recent case report successfully used diazepam 20 mg for detoxification from 6 mg daily bromazepam use.

Conversion Rationale

The evidence for bromazepam-to-diazepam conversion comes from two sources:

Clinical Trial Equivalency

A randomized controlled trial directly compared bromazepam 6 mg three times daily with diazepam 5 mg three times daily in patients with acute anxiety states 1. Both regimens showed similar efficacy on the Hamilton anxiety rating scale, suggesting that 6 mg bromazepam ≈ 5 mg diazepam on a per-dose basis. This would translate to approximately 10 mg diazepam for a single 6 mg bromazepam dose.

Another study compared bromazepam 18 mg/day with diazepam 15 mg/day, finding bromazepam slightly more effective 2. This 1.2:1 ratio (18:15) also supports the approximate 1:1.7 conversion (6 mg bromazepam to 10 mg diazepam).

Detoxification Experience

A 2025 case report described successful detoxification from 6 mg daily bromazepam using 20 mg diazepam 3. The authors noted they expected a higher dose would be needed but found 20 mg sufficient. This suggests that for chronic daily use and withdrawal management, a more conservative 1:3.3 ratio may be safer.

Recommended Approach

For acute conversion (switching medications):

• Convert bromazepam 6 mg to diazepam 10 mg based on equipotent dosing from clinical trials 1, 2
• Administer the diazepam dose and monitor for 2-4 hours
• Adjust based on clinical response

For detoxification/withdrawal management:

• Convert bromazepam 6 mg daily to diazepam 20 mg daily 3
• Use a combination of fixed-dose and symptom-triggered dosing
• Taper gradually per standard benzodiazepine withdrawal protocols 4

Switching Protocol

1. Assess the clinical context: Is this a simple medication switch or management of dependence/withdrawal?

2. For medication switching without dependence:

   • Start diazepam 10 mg at the time the next bromazepam dose would be due
   • Monitor for under-sedation (anxiety, restlessness) or over-sedation (drowsiness, ataxia)
   • Adjust by 2.5-5 mg increments as needed 4

3. For dependence/withdrawal:

   • Start diazepam 20 mg daily (divided into 2-4 doses initially)
   • Stabilize for 24-48 hours
   • Taper by 10-25% every 1-2 weeks, adjusting based on withdrawal symptoms 3
   • Slower tapers (reducing by 2-2.5 mg every 1-2 weeks) reduce withdrawal reactions 4

Important Caveats

• Elderly or frail patients: Start with diazepam 2-2.5 mg and titrate gradually 4. Consider using 50% of the calculated dose initially.

• Hepatic or renal impairment: Diazepam has a long half-life (20-120 hours) and active metabolites that accumulate 5. Consider dose reduction or alternative benzodiazepines like lorazepam.

• Respiratory disease: Both drugs cause respiratory depression; use lower doses and monitor closely 6.

• Concurrent CNS depressants: Synergistic respiratory depression occurs with opioids, antipsychotics, or alcohol 7. Reduce benzodiazepine dose by 50% or more if combining with other sedatives.

• Withdrawal risk: Abrupt discontinuation of either benzodiazepine can cause seizures. Always use gradual tapering 4.

The conversion ratio varies depending on whether you're managing acute switching (1:1.7 ratio, or 6 mg to 10 mg) versus chronic dependence (1:3.3 ratio, or 6 mg to 20 mg). The higher dose for detoxification accounts for tolerance and provides a safety margin to prevent withdrawal symptoms 3.