[Treatment of paraphilia and sexually aggressive impulsive behavior with the LHRH-agonist leuprolide acetate]

Pharmacological interventions for those who have sexually offended or are at risk of offending

BACKGROUND

Sexual offending is a serious social problem, a public health issue, and a major challenge for social policy. Victim surveys indicate high incidence and prevalence levels and it is accepted that there is a high proportion of hidden sexual victimisation. Surveys report high levels of psychiatric morbidity in survivors of sexual offences.Biological treatments of sex offenders include antilibidinal medication, comprising hormonal drugs that have a testosterone-suppressing effect, and non-hormonal drugs that affect libido through other mechanisms. The three main classes of testosterone-suppressing drugs in current use are progestogens, antiandrogens, and gonadotropin-releasing hormone (GnRH) analogues. Medications that affect libido through other means include antipsychotics and serotonergic antidepressants (SSRIs).

OBJECTIVES

To evaluate the effects of pharmacological interventions on target sexual behaviour for people who have been convicted or are at risk of sexual offending.

SEARCH METHODS

We searched CENTRAL (2014, Issue 7), Ovid MEDLINE, EMBASE, and 15 other databases in July 2014. We also searched two trials registers and requested details of unidentified, unpublished, or ongoing studies from investigators and other experts.

SELECTION CRITERIA

Prospective controlled trials of antilibidinal medications taken by individuals for the purpose of preventing sexual offences, where the comparator group received a placebo, no treatment, or 'standard care', including psychological treatment.

DATA COLLECTION AND ANALYSIS

Pairs of authors, working independently, selected studies, extracted data, and assessed the risk of bias of included studies. We contacted study authors for additional information, including details of methods and outcome data.

MAIN RESULTS

We included seven studies with a total of 138 participants, with data available for 123. Sample sizes ranged from 9 to 37. Judgements for categories of risk of bias varied: concerns were greatest regarding allocation concealment, blinding of outcome assessors, and incomplete outcome data (dropout rates in the five community-based studies ranged from 3% to 54% and results were usually analysed on a per protocol basis).Participant characteristics in the seven studies were heterogeneous, but the vast majority had convictions for sexual offences, ranging from exhibitionism to rape and child molestation.Six studies examined the effectiveness of three testosterone-suppressing drugs: cyproterone acetate (CPA), ethinyl oestradiol (EO), and medroxyprogesterone acetate (MPA); a seventh evaluated two antipsychotics (benperidol and chlorpromazine). Five studies were placebo-controlled; in two, MPA was administered as an adjunctive treatment to a psychological therapy (assertiveness training or imaginal desensitisation). Meta-analysis was not possible due to heterogeneity of interventions, comparators, study designs, and other issues. The quality of the evidence overall was poor. In addition to methodological issues, much evidence was indirect.

PRIMARY OUTCOME

recividism. Two studies reported recidivism rates formally. One trial of intramuscular MPA plus imaginal desensitisation (ID) found no reports of recividism at two-year follow-up for the intervention group (n = 10 versus one relapse within the group treated by ID alone). A three-armed trial of oral MPA, alone or in combination with psychological treatment, reported a 20% rate of recidivism amongst those in the combined treatment arm (n = 15) and 50% of those in the psychological treatment only group (n = 12). Notably, all those in the 'oral MPA only' arm of this study (n = 5) dropped out immediately, despite treatment being court mandated.Two studies did not report recidivism rates as they both took place in one secure psychiatric facility from which no participant was discharged during the study, whilst another three studies did not appear directly to measure recividism but rather abnormal sexual activity alone.

SECONDARY OUTCOMES

The included studies report a variety of secondary outcomes. Results suggest that the frequency of self reported deviant sexual fantasies may be reduced by testosterone-suppressing drugs, but not the deviancy itself (three studies). Where measured, hormonal levels, particularly levels of testosterone, tended to correlate with measures of sexual activity and with anxiety (two studies). One study measured anxiety formally; one study measured anger or aggression. Adverse events: Six studies provided information on adverse events. No study tested the effects of testosterone-suppressing drugs beyond six to eight months and the cross-over design of some studies may obscure matters (given the 'rebound effect' of some hormonal treatments). Considerable weight gain was reported in two trials of oral MPA and CPA. Side effects of intramuscular MPA led to discontinuation in some participants after three to five injections (the nature of these side effects was not described). Notable increases in depression and excess salivation were reported in one trial of oral MPA. The most severe side effects (extra-pyramidal movement disorders and drowsiness) were reported in a trial of antipsychotic medication for the 12 participants in the study. No deaths or suicide attempts were reported in any study. The latter is important given the association between antilibidinal hormonal medication and mood changes.

AUTHORS' CONCLUSIONS

We found only seven small trials (all published more than 20 years ago) that examined the effects of a limited number of drugs. Investigators reported issues around acceptance and adherence to treatment. We found no studies of the newer drugs currently in use, particularly SSRIs or GnRH analogues. Although there were some encouraging findings in this review, their limitations do not allow firm conclusions to be drawn regarding pharmacological intervention as an effective intervention for reducing sexual offending.The tolerability, even of the testosterone-suppressing drugs, was uncertain given that all studies were small (and therefore underpowered to assess adverse effects) and of limited duration, which is not consistent with current routine clinical practice. Further research is required before it is demonstrated that their administration reduces sexual recidivism and that tolerability is maintained.It is a concern that, despite treatment being mandated in many jurisdictions, evidence for the effectiveness of pharmacological interventions is so sparse and that no RCTs appear to have been published in two decades. New studies are therefore needed and should include trials with larger sample sizes, of longer duration, evaluating newer medications, and with results stratified according to category of sexual offenders. It is important that data are collected on the characteristics of those who refuse and those who drop out, as well as those who complete treatment.

[Paraphilia, sexual preference disorders. Diagnosis, etiology, epidemiology, treatment and prevention]

Hostility towards relationships is one prominent characteristic symptom for disorders of sexual preference (ICD-10) and paraphilias (DSM-IV). Paraphilic symptoms sometimes progress to obsessive or addictive- like forms leading to a loss of self-control but can occur also as single incidents or as episodic events. Besides constitutional aspects, problems in the development of close relationships to primary caregivers (attachment) play an important role in the development of these disorders. Actual relationship- and self-confidence problems often trigger the severity of disturbance, especially in the episodic forms of paraphilia. For patients who are in conflict with the law, cognitive-behavioral therapeutic approaches with the aim to minimize self-deception regarding the effects of the paraphilic behavior have become more and more relevant. Regarding the medical treatment, anti-hormonal therapy plays an important role, but also treatment with serotonergic agents and naltrexone are used. Only little can be advised in terms of prevention; general psycho-hygiene (regarding the parent-child relationship) is recommended. Beside these general measures, institutions which offer special treatment for people in danger to become delinquents may be able to prevent serious harm for possible victims of abuse.

Antihormonal treatment of paraphilic patients in German forensic psychiatric clinics

The aim of this study was to investigate which antihormonal treatment strategies are used in German forensic psychiatric institutions. Forensic clinics were asked about the number of treated patients. Four hundred seventy-four patients were committed for sex offences; 12% received either CPA (n = 29) or LHRH- agonists (n = 29). Differences in efficacy were small. Several side effects confirm the importance of a protocol for minimizing medical complications.

Treatment of paraphilia with luteinizing hormone-releasing hormone agonists

Up to now there have been no published results of therapy of paraphilia (for example, pedophilia or sadism) and sexual aggressive impulsiveness with luteinizing hormone-releasing hormone (LHRH) agonists in the German-speaking countries. After a short introduction about physiologic features and the present state of investigations in treatment of paraphilia with LHRH agonists we describe 11 patients who were treated with the LHRH agonist Leuprolide Acetate over a period of 12 months. The patients showed no tendency toward sexually aggressive behavior and reported an evident reduction of penile erection, ejaculation, masturbation, sexually deviant impulsiveness, and fantasies. One patient died from suicide. In combination with other treatments, LHRH Agonists seem to be a very promising alternative to cyproterone acetate and its possible carcinogene effects.