The third level of the code is based on the therapeutic/pharmacological subgroup and consists of one letter.
The fourth level of the code is based on the chemical/therapeutic/pharmacological subgroup and consists of one letter.
The ATC/DDD system is the ATC system with the addition of a measure of the assumed average maintenance dose per day for a drug used for its main indication in adults (Defined Daily Doses).
ATC TechBriefs are short documents on subjects of interest to earthquake engineering professionals.
ATC Announces Availability of ATC-54 Report, Guidelines for Using Strong-Motion Data and Shakemaps in Postearthquake Response.
ATC announces the availability of the SEAW/ATC- 60 Report, SEAW Commentary on Wind Code Provisions (2-volume set), and the SEAW Handbook of a Rapid-Solutions Methodology for Wind Design.