This study evaluated a self-rated instrument for assessing perceived craving, mood, energy, and health levels in patients who are withdrawing from cocaine addiction. The instrument consisted of four 20-centimeter line scales. Twenty-five patients in a 28-day inpatient addictions treatment unit were chosen at random points in their treatment and given a chance to rate themselves on each scale by making a mark on a line that corresponded to their self-perception. Each patient performed two self-assessment, one day apart. The scores for each scale were correlated and found to be highly reliable. Surprisingly, none of the other three scale scores had a strong relationship with craving, and possible reasons for this result are discussed.