Dosage
        Phenobarbitone's dosage details are as follows:
        
            
                | Dose | Single Dose | Frequency | Route | Instructions | 
            
                | Adult Dosage | 
            | 50 to 200 mg | 120 (125) | 6 hourly | IV,IM |  | 
| 60 to 180 mg | 120 (120) | 24 hourly | PO | Taken at night. | 
            
                | Paedriatic Dosage (20kg) | 
            | 3.1 mg/kg | 3.1 (3.1) | 24 hourly | Oral | - | 
            
                | Neonatal Dosage (3kg) | 
            | 3.1 mg/kg | 3.1 (3.1) | 24 hourly | Oral | - |