What is the recommended workup for a woman presenting with low libido?

Workup for Low Libido in Females

Begin with a detailed sexual history using the Brief Sexual Symptom Checklist for Women, followed by systematic screening for psychological factors, medication review, physical examination with focus on vaginal health, and selective laboratory testing including morning testosterone and thyroid function. 1

Initial Sexual History Assessment

• Document the patient's baseline sexual function before symptoms began, current level of sexual activity, and specific impact on intimacy and relationships 2, 1
• Use the Brief Sexual Symptom Checklist for Women as your primary screening tool 2, 1
• For more comprehensive evaluation, employ the Female Sexual Function Index (FSFI), a validated 19-item instrument assessing desire, arousal, lubrication, orgasm, and satisfaction 2, 1
• The Arizona Sexual Experience Scale (ASEX) is an alternative 5-item tool covering sexual drive, arousal, lubrication, ability to reach orgasm, and satisfaction 1

Psychological and Relationship Screening

• Screen systematically for depression, anxiety, body image concerns, and relationship distress—these are major contributors to reduced libido 2, 1
• Assess for history of physical or sexual abuse 3
• Evaluate partner sexual function and relationship quality, as partner dysfunction and relationship dissatisfaction are significant risk factors 1, 3
• Document substance use including alcohol consumption, recreational drugs, and smoking 1, 4

Comprehensive Medication Review

• Identify SSRIs (paroxetine, sertraline, citalopram, fluoxetine) as common culprits that suppress libido 2, 1
• Review hormonal therapies, particularly aromatase inhibitors and hormonal contraceptives 2, 1
• Assess antihypertensives, especially beta-blockers, which are strongly associated with sexual dysfunction 1
• Consider opioids, corticosteroids, and H2-receptor antagonists as potential contributors 1
• Evaluate whether switching to alternatives with lower sexual side effect profiles is feasible 1

Physical and Gynecologic Examination

• Perform a focused gynecologic examination to identify vaginal atrophy, anatomic changes, and points of tenderness 2, 1, 4
• Assess specifically for mucosal thinning, loss of rugae, and tissue friability indicating vaginal atrophy 1
• Measure blood pressure as part of the cardiovascular risk assessment 4

Laboratory Workup

Order morning testosterone levels (preferably free testosterone or androgen index) to prevent unnecessary endocrine investigation in up to 50% of cases. 1 Note that obtaining testosterone levels in women in nonresearch settings has limited routine value according to some guidelines, but is recommended when clinical suspicion of hypogonadism exists 2, 1, 4

• Check TSH and free T4 if thyroid dysfunction is suspected 1, 4
• Measure prolactin levels when there is loss of libido with low testosterone 1, 4
• Screen for diabetes with fasting glucose or HbA1c, as diabetes affects sexual function through vascular and neurological mechanisms 1, 4
• Obtain a complete metabolic panel if renal or hepatic impairment is suspected 4

Assessment of Chronic Medical Conditions

• Screen for cardiovascular disease and hypertension, which impair sexual function through vascular mechanisms 1
• Assess for diabetes mellitus, causing dysfunction through both vascular and neurological pathways 1
• Evaluate for chronic kidney disease, liver failure, and metabolic syndrome (obesity, insulin resistance) 1
• Consider neurological conditions such as multiple sclerosis and Parkinson's disease 1
• Document cancer treatment history, including chemotherapy, radiation, and hormonal cancer treatments, which commonly suppress libido 1

Indications for Specialist Referral

• Multiple endocrine abnormalities requiring specialized evaluation 1, 4
• Primary reduced libido persisting despite addressing obvious contributing factors 1
• Complex psychological factors requiring cognitive behavioral therapy or psychosexual therapy (which shows 50-80% success rates) 1, 4
• Patients desiring specialized sexual health counseling 1

Common Pitfalls to Avoid

• Failing to ask direct questions about sexual function—many women will not volunteer this information and require specific inquiry 5, 6
• Overlooking vaginal symptoms (dryness, dyspareunia, atrophy) that contribute to sexual avoidance and decreased libido 1, 6
• Not considering that sexual decline commonly precedes natural menopause, even though women may not report it until menopausal symptoms become pronounced 5
• Ordering extensive laboratory testing without clinical indication—laboratory data are of limited value except when warranted by history or physical examination 3