Barbiturate and hypnosedative withdrawal by a multiple oral phenobarbital loading dose technique

Area of Science:

• Pharmacology
• Addiction Medicine
• Clinical Pharmacology

Background:

• Intravenous phenobarbital loading is effective for barbiturate withdrawal but inconvenient.
• A practical, widely applicable method for barbiturate withdrawal management is needed.

Purpose of the Study:

• To evaluate the efficacy and safety of oral phenobarbital loading doses for barbiturate withdrawal.
• To establish a practical clinical protocol for oral phenobarbital administration.

Main Methods:

• Oral phenobarbital loading doses were administered to 21 barbiturate addicts (mean daily intake 1 gm).
• Dosing continued at 120 mg/hr until a clinical endpoint (nystagmus, drowsiness, ataxia, dysarthria, or emotional lability) was met.
• Phenobarbital concentrations and half-life were monitored.

Main Results:

• The mean loading dose was 23.4 +/- 7.1 mg/kg.
• Median phenobarbital concentration post-loading was 35.9 mg/l, with a median half-life of 90 hours.
• No patients experienced seizures or other withdrawal symptoms.

Conclusions:

• Oral phenobarbital loading is a safe and effective method for managing barbiturate withdrawal.
• This approach provides a practical alternative to intravenous administration, reducing inconvenience.