Discovery and development of statins polar methane sulfonamide group, which is quite hydrophilic and confers low lipophilicity. The sulfonamide group forms a unique polar interaction with the enzyme. As a result, rosuvastatin has superior binding affinity to the HMGR enzyme compared to the other statins, which is directly related to its efficiency to lower LDL cholesterol. Lipophilicity of the statins is considered to be quite important since the hepatoselectivity of the statins is related to their lipophilicity. The more lipophilic statins tend to achieve higher levels of exposure in non-hepatic tissues, while the hydrophilic statins tend to be more hepatoselective. The difference in selectivity is
Specialty drugs in the United States testing; and "biologics", or medicines created through biologic processes, rather than chemically synthesized like most pharmaceuticals". He argued that there should be a slight increase in co-pays for the more commonly using lower-tier medications to allow a lower co-pay for those who "require high-cost specialty tier medications". According to the 2014 Express Scripts Drug Trend Report, the most significant increase in prescription drugs in the United States in 2014 was due to "increased inflation and utilization of hepatitis C and compounded medications". "Excluding those two therapy classes, overall drug spend would have increased only 6.4%. The cost of "the top