Seconal sodium is used to sedate patients immediately before surgery. Seconal sodium belongs to a class of medications known as barbiturate hypnotics. It works by affecting certain parts of the brain to calm you down. Older adults should discuss the risks and benefits of this medication with their doctor or pharmacist, as well as other effective and potentially safer treatments. Read the Medication Guide provided with the product from our online pharmacy before you start taking Seconal sodium and each time you receive a booster dose. If you have any questions, consult your doctor or pharmacist. Take this medication on an empty stomach before surgery, as directed by your doctor.