For Intravenous Use in Adults
For Rectal and Intramuscular Use Only in Pediatric Patients
Brevital® Sodium (Methohexital Sodium for Injection, USP) is 2,4,6 (1 H, 3 H, 5 H)-Pyrimidinetrione, 1-methyl-5-(1-methyl-2-pentynyl)-5-(2-propenyl)-, (±)-, monosodium salt and has the empirical formula C14H17N2NaO3. Its molecular weight is 284.29.
The structural formula is as follows:
Methohexital sodium is a rapid, ultrashort-acting barbiturate anesthetic. Methohexital sodium for injection is a freeze-dried, sterile, nonpyrogenic mixture of methohexital sodium with 6% anhydrous sodium carbonate added as a buffer. It contains not less than 90% and not more than 110% of the labeled amount of methohexital sodium. It occurs as a white, freeze-dried plug that is freely soluble in water.
This product is oxygen sensitive. The pH of the 1% solution is between 10 and 11; the pH of the 0.2% solution in 5% dextrose is between 9.5 and 10.5.
Methohexital sodium may be administered by direct intravenous injection or continuous intravenous drip, intramuscular or rectal routes (see PRECAUTIONSâ€”Pediatric Use). Reconstituting instructions vary depending on the route of administration (see DOSAGE AND ADMINISTRATION).