Diazepam Dosage for Seizure Control

Administration Routes and Dosage

The American Academy of Pediatrics recommends a dose of 0,1-0,3 mg/kg of diazepam intravenously every 5-10 minutes (maximum 10 mg per dose) for seizure control 1
The maximum dose of diazepam is 10 mg per dose when administered intravenously 2
Administration of diazepam should be done slowly over approximately 2 minutes to avoid local injection site pain 1
The rectal route is an effective alternative when intravenous access is not available, with a dose of 0,5 mg/kg up to 20 mg 1, 2

Diazepam should be followed immediately by a long-acting anticonvulsant (such as phenytoin/fosphenytoin) due to its rapid redistribution and frequent recurrence of seizures within 15-20 minutes 1, 2
Lorazepam may be preferred over diazepam due to its longer anticonvulsant duration of action 1, 2

There is a higher incidence of apnea when diazepam is administered rapidly intravenously or in combination with other sedative agents 2, 3
Oxygen saturation and respiratory effort should be monitored 3
Be prepared to provide ventilatory support 2
Flumazenil may be administered to reverse potentially fatal respiratory depression caused by diazepam, but it also neutralizes the anticonvulsant effects and may precipitate seizures 2, 3

Start with intravenous diazepam 0,1-0,3 mg/kg (maximum 10 mg) if intravenous access is available 1
If intravenous access is not available, administer rectal diazepam 0,5 mg/kg (maximum 20 mg) 1, 4
If seizures persist after 5-10 minutes, repeat the dose of diazepam 1
After initial control with diazepam, immediately start a long-acting anticonvulsant such as phenytoin/fosphenytoin 1, 2
Continuously monitor vital signs and oxygen saturation 2, 3

Lorazepam may be preferred over diazepam due to its longer anticonvulsant duration of action, with lorazepam controlling seizures in status epilepticus in 89% of cases, compared to 76% with diazepam, although this difference was not statistically significant 5
Lorazepam is associated with a lower risk of respiratory depression compared to diazepam, with a relative risk of 0.72 (95% CI 0.55-0.93) 5

Hypotension may occur, particularly with phenytoin but less commonly with diazepam, according to the American College of Emergency Physicians 6

The American College of Emergency Physicians recommends initiating a loading dose of phenytoin/fosphenytoin (18 mg/kg) or alternative long-acting anticonvulsant immediately after seizure control with diazepam, with a strength of evidence based on clinical trials 7