Non-compliance is the most frequent cause of recurrence during prophyl
actic lithium treatment and is associated with poor response and high
levels of suicidality. Non-compliance is a complex phenomenon and may
have a number of causes. When manic-depressive patients fare badly und
er the conditions of so-called 'naturalistic' trials, this usually ind
icates that such conditions are inadequate for long-term maintenance t
reatment. Prophylactic lithium treatment must be accompanied by measur
es to sustain compliance and counteract drop-out, and these measures b
uild on three cornerstones, namely information, support and supervisio
n.