No experiments have shown that the various routes of administration are equal with respect to bioavailability. Barbiturates are substituted pyrimidine derivatives by which the basic structure typical to these drugs is barbituric acid, a substance which has no central nervous system (CNS) activity. CNS activity is obtained by substituting alkyl, https://milosvxyb.blogolenta.com/27925595/the-basic-principles-of-is-nembutal-a-barbiturate