Title

Study of Maca Root to Treat Sexual Dysfunction Associated With the Treatment Regimen for Bipolar Disorder in Females
A Double-Blind, Placebo Controlled Study of Maca Root for the Treatment of Sexual Dysfunction Associated With the Treatment Regimen for Bipolar Disorder in Females
  • Phase

    Phase 3
  • Study Type

    Interventional
  • Intervention/Treatment

    maca root ...
  • Study Participants

    8
The purpose of this research study is to find out whether Maca Root is effective for treating sexual dysfunction in females that is caused by the treatment for bipolar disorder. An additional aim of the study is to document the safety and tolerability of maca root, as well as any potential side effects that it causes. We suspect that Maca Root will result in a significant reduction in sexual dysfunction when compared to a placebo group.
The study seeks to enroll 80 patients with sexual dysfunction associated with their bipolar medication regimen over 24 months. Subjects were outpatient females between 18 and 80 years old with no significant symptoms of mania (Young Mania Rating Scale score<10), and who have been on a steady regimen of medications to treat bipolar disorder for at least 8 weeks, with a stable dose for at least 4 weeks. Subjects will be randomly assigned in a double blind manner to receive 3000 mg/day of maca root or identical placebo for 12 weeks to determine whether maca root is more effective than placebo for the treatment of sexual dysfunction associated with treatment regimens for bipolar disorder.
Study Started
Feb 26
2008
Primary Completion
Apr 26
2010
Study Completion
Apr 26
2010
Results Posted
Sep 07
2020
Last Update
Sep 25
2020

Drug Maca Root

3g/day of Maca Root for 12 weeks.

  • Other names: Lepidium

Drug Placebo

Placebo provided by research pharmacy daily for 12 weeks.

  • Other names: Inactive placebo

Maca Root Experimental

Subjects in this arm will be given 3g/day of Maca Root.

Placebo Placebo Comparator

Subjects in this arm will receive inactive placebo.

Criteria

Inclusion Criteria:

Subject is female, age 18 to 80 years
Subject has been on a steady regimen to treat bipolar disorder, including monotherapy with or any combination of antidepressants, mood stabilizers, atypical antipsychotics, or benzodiazepines, for at least 8 weeks; and is currently on a stable dose of that regimen for at least 4 weeks
Subject is currently euthymic (Hamilton-D scale score < 10) and is without significant anxiety symptoms (Hamilton-A < 10). Her bipolar disorder must be in remission (Young Mania Rating Scale score < 10)
Subject must have had no sexual dysfunction prior to taking psychotropic medications and there must be a clear temporal relationship between the sexual dysfunction and the treatment for bipolar disorder
Subject must have been consistently experiencing at least one of the following criteria for at least 4 weeks, with distress or disability:
Inability to have an orgasm, according to patient opinion
Clinically significant orgasm delay with masturbation or intercourse
Inability to attain or maintain until completion of sexual activity an adequate lubrication swelling response of sexual excitement
Decreased libido according to patient opinion
Subject must be having or had been having some form of regular sexual activity (masturbation, oral sex, intercourse) at least twice monthly prior to the bipolar treatment regimen and is willing to continue efforts at sexual activity at least once weekly for the duration of the study
Subject must be in good general physical health
Subject must be able to understand and communicate in English
Subject must have given informed consent to participate in the study

Exclusion Criteria:

Primary or prior diagnosis of a sexual disorder (other than the side effect of the bipolar medication or symptom of the bipolar disorder)
Sexual dysfunction secondary to general underlying medical condition
Penile, vaginal, clitoral or other sexual organ anatomical deformities
Any uncontrolled psychiatric disorder
Alcohol or substance abuse or dependence within the past six months
Recent major relationship changes, disruption, or turmoil ongoing or anticipated which are unrelated to her sexual dysfunction
Blood pressure outside the range of 90/50 - 170/100
Known hyperprolactinemia
Use of investigational drugs within previous 3 months or during study
Current use of other drugs for sexual dysfunction or other therapies or medications to treat sexual dysfunction
Current use of nefazodone
Hormone replacement therapy, unless patient has been on stable dose of hormone therapy for at least 3 mo prior to the bipolar treatment regimen and had no sexual dysfunction while on the same hormone therapy regimen, and there is no change in the hormone replacement therapy during the study
Pregnancy, lactating, or planning to become pregnant during the study
Child bearing potential subjects unwilling and/or not prepared and/or who are judged unreliable to use an acceptable and verifiable form of contraception during the study
Any clinically significant abnormality on the screening physical examination
History of hormonal cancers
Any medical or psychological condition or social circumstances that would impair subject's ability to participate reliably in the study, or that may increase the risk to subjects or others as a result of participating in this study
Dyspareunia secondary to an inflammatory or anatomical condition
Prior use of maca for at least two weeks
Infection of the urogenital tract that may make sexual activity painful or difficult
Subjects whose sexual partners are suffering from and/or receiving treatment for sexual dysfunction
Receiving psychosexual or other therapy for sexual dysfunction and not willing to discontinue that treatment at screening
Subjects who do not understand and communicate in English
Subjects for whom sexual activity is inadvisable
Subjects whose sexual dysfunction is considered to be situational
Subjects not attempting some form of regular sexual activity at least twice monthly and at least once weekly during study visit intervals for duration of entire study
Changes in bipolar medication and/or dose of medication within the last 4 weeks before baseline visit
Participants on medications with a narrow therapeutic window or low therapeutic index for which small variations may be harmful given the lack of systematic experience with drug-supplement interactions (i.e. - cyclosporine, digoxin, warfarin, and antiretrovirals)

Summary

Maca Root

Placebo

All Events

Event Type Organ System Event Term Maca Root Placebo

Reductions in Arizona Sexual Experience Scale (ASEX) Scores Over 12 Weeks of Treatment.

The ASEX scale consists of five items rating sexual drive, arousal, vaginal lubrication/penile erection, ability to reach orgasm, and satisfaction from orgasm. The range of total score is from 5-30, with the higher scores indicating greater sexual dysfunction. Scores were obtained at baseline and at all biweekly assessment visits over the 12 weeks of treatment.

Maca Root

ASEX-Baseline Score

23.7
units on a scale (Mean)
Standard Deviation: 1.5

ASEX-Change in Score

-0.3
units on a scale (Mean)
Standard Deviation: 4.2

ASEX-Final Score

23.3
units on a scale (Mean)
Standard Deviation: 3.8

Placebo

ASEX-Baseline Score

21.3
units on a scale (Mean)
Standard Deviation: 0.6

ASEX-Change in Score

1.5
units on a scale (Mean)
Standard Deviation: 2.1

ASEX-Final Score

23.0
units on a scale (Mean)
Standard Deviation: 2.8

Reductions in Massachusetts General Hospital Sexual Dysfunction (MGH-SD) Inventory Scores Over 12 Weeks of Treatment.

This instrument is composed of five items evaluating libido, sexual arousal or excitement, ability to achieve orgasm, ability to achieve and maintain an erection (for men only) and overall sexual satisfaction. Items are rated on a scale of 1 to 6 with a rating of 1 indicating greater than normal functioning and a rating of 6 indicating totally absent functioning. Possible total scores range from 5-30, with higher scores indicating greater pathology. Scores were obtained at baseline and at each biweekly assessment visit over 12 weeks of treatment.

Maca Root

Change in MGH-SD Score

-4.3
units on a scale (Mean)
Standard Deviation: 6.1

MGH-SD Score-Baseline

21.0
units on a scale (Mean)
Standard Deviation: 2

MGH-SD Score-Final

16.7
units on a scale (Mean)
Standard Deviation: 5.0

Placebo

Change in MGH-SD Score

-0.7
units on a scale (Mean)
Standard Deviation: 2.1

MGH-SD Score-Baseline

18.7
units on a scale (Mean)
Standard Deviation: 2.3

MGH-SD Score-Final

18.0
units on a scale (Mean)
Standard Deviation: 1.7

Total

8
Participants

Total

8
Participants

Age, Continuous

37
years (Mean)
Standard Deviation: 10

Hamilton D-17 score

6
units on a scale (Mean)
Standard Deviation: 2

Young Mania Rating Scale score

1.8
units on a scale (Mean)
Standard Deviation: 1.7

Age, Categorical

Race/Ethnicity, Customized

Region of Enrollment

Sex: Female, Male

Overall Study

Maca Root

Placebo

Drop/Withdrawal Reasons

Maca Root

Placebo