Best Medication for Kleptomania
Naltrexone is the most effective pharmacologic treatment for kleptomania, with the strongest evidence supporting doses of 50-150 mg/day (mean effective dose approximately 116.7 mg/day). 1
Evidence Base
The recommendation for naltrexone is based on the only double-blind, placebo-controlled trial specifically for kleptomania, which demonstrated statistically significant reductions in both stealing urges and behaviors 1. In this 8-week trial of 25 adults with DSM-IV kleptomania:
- Naltrexone showed superior efficacy compared to placebo on all primary outcome measures
- Significant reductions in total kleptomania severity scores (p = .001)
- Significant reductions in stealing urges (p = .032)
- Significant reductions in stealing behavior (p < .001)
- 92% study completion rate, indicating good tolerability
- The medication was well-tolerated with minimal adverse effects
A 2022 systematic review of all randomized controlled trials for impulse control disorders confirmed that naltrexone was the only medication with demonstrated efficacy for kleptomania 2.
Dosing Strategy
Start naltrexone at 50 mg/day and titrate as needed and tolerated up to 150 mg/day based on clinical response. The mean effective dose in the controlled trial was 116.7 mg/day (±44.4 mg/day) 1. Monitor response every 2 weeks using measures of urge frequency and stealing behavior.
Alternative Considerations (Weaker Evidence)
SSRIs have inconsistent evidence and should not be first-line:
- Escitalopram showed a high initial response rate (79%) in open-label treatment, but this was not maintained better than placebo in the double-blind discontinuation phase 3
- The 50% relapse rate on escitalopram versus placebo suggests the disorder may be heterogeneous, with some cases responding to psychological factors rather than serotonergic mechanisms 3
- Fluoxetine has failed in case reports 4
Topiramate has only case series support (3 patients) when used alone or combined with SSRIs, representing the lowest level of evidence 5.
Clinical Pearls
- Kleptomania appears to have reward-based and compulsive features that respond to opioid antagonism, not serotonergic modulation 1, 6
- Co-occurring OCD and eating disorders are associated with worse symptom severity and should be identified, as they may require additional targeted treatment 6
- The sense of excitement or reward from stealing predicts worse severity and supports the rationale for opioid antagonist therapy 6
- Avoid polypharmacy - if naltrexone fails after an adequate 8-week trial at therapeutic doses, consider whether this represents true treatment resistance or a case better suited for cognitive-behavioral approaches 3
Common Pitfalls
Do not start with SSRIs based on the obsessive-compulsive features of kleptomania - the controlled evidence shows they do not maintain improvement better than placebo 3. The high open-label response rates to SSRIs likely reflect placebo effects or natural fluctuation in symptoms rather than true pharmacologic efficacy.