Fixed-Schedule Therapy

Benzodiazepines given at fixed dosing intervals are a common therapy for alcohol withdrawal management, and are well suited to ambulatory withdrawal, community residential and inpatient withdrawal settings. Fixed schedules are also appropriate for complex hospitalised patients, ideally with daily review by specialist drug and alcohol clinicians. Fixed schedule regimens typically involve reducing doses over a 3 to 6 day period, and require regular clinical review (minimum of daily) to ensure the patient is not over or under-medicated (Table 8.5 provides an example of a fixed-schedule regimen). Fixed schedule regimens may be supplemented with additional diazepam as needed for people with low tolerance of withdrawal discomfort (for example, 5 mg 6 hourly as needed, based on clinical observation or alcohol withdrawal scale scores). 

Access to diazepam doses should be restricted (for example, daily dispensing) and/or doses supervised by carers for patients undertaking ambulatory withdrawal in order to prevent misuse of medication. Diazepam should not be used if the patient continues to drink alcohol and regular breathalyser readings should be used if in doubt.  

Table 8.5: Example of fixed-schedule regimen

Moderate to severe withdrawal predicted
Oral diazepam dose*

Day 1 20 mg four times a day

Day 2 10 mg four times a day

Day 3 10 mg twice a day

Day 4 5 mg twice a day

Day 5 5 mg 12 hourly as needed

Mild withdrawal predicted (also suitable for ambulatory alcohol withdrawal)
Oral diazepam dose*

Day 1 10 mg four times a day

Day 2 10 mg three times a day

Day 3 10 mg twice a day

Day 4 5 mg twice a day

Day 5 5 mg at night as needed

Note: * In practice, a hybrid approach can be recommended with fixed schedule plus an additional diazepam dose (for example, 5 mg 6 to 12 hourly as needed, based on clinical observation or alcohol withdrawal scale scores).

Chapter Recommendation Grade of recommendation
8.28 Diazepam should be administered in a fixed dose regimen in ambulatory settings, or for those with concomitant medical, psychiatric or substance use disorders. C

Figure 8.2: Selecting benzodiazepine regimen for alcohol withdrawal

Chapter 8 - Figure 8.2: Selecting benzodiazepine regimen for alcohol withdrawal

Note: CIWA-Ar – Clinical Institute Withdrawal Assessment for Alcohol Scale; AWS – Alcohol Withdrawal Symptoms – Rating Scale; QID – four times a day