The Lifetime Psychotropic Treatment Response scale (LPTR) is a modified scale from the Lithium Lifetime Treatment Response scale (LLTR) (58). The LPTR scale covers treatment response to various types of psychotropic medication and hence replaces the LLTR. Criterion A is used to estimate response to antidepressant treatment, while Criterion B is used to establish whether there is a causal relationship between clinical improvement and the treatment. The scale is quick and easy to administer (on average it takes about 5 min) and gives an overall picture of the effectiveness of antidepressant medication.
