Nembutal Pentobarbital Sodium (Injectable) $380.00 – $900.00 Nembutal Pentobarbital Sodium is a barbiturate that acts as a depressant, or sedative, used short-term to treat insomnia. Nembutal is also used as an emergency treatment for seizures, and to cause patients to fall asleep for surgery. Nembutal is available in generic form. Nembutal Pentobarbital Sodium Select options This product has multiple variants. The options may be chosen on the product page