What are the symptoms, diagnostic criteria, and treatment options for premenstrual syndrome (PMS)?

Premenstrual Syndrome (PMS)

Overview and Diagnosis

PMS is diagnosed clinically based on the presence of at least one moderate-to-severe mood symptom plus one physical symptom occurring during the luteal phase (1-2 weeks before menstruation) with complete resolution by day 4 of menses, causing functional impairment. 1, 2

Diagnostic Criteria

Key requirement: Prospective daily symptom tracking for at least 2 consecutive menstrual cycles is mandatory for diagnosis 1, 3, 2. This distinguishes PMS from other psychiatric conditions that may worsen premenstrually.

Symptom patterns to document:

• Timing: Symptoms must be absent between menstruation and ovulation (follicular phase) 4
• Severity: At least one moderate-to-severe symptom causing functional impairment
• Resolution: Symptoms resolve within days after menstruation begins

Distinguish PMS from PMDD (Premenstrual Dysphoric Disorder):

• PMS: 1-4 symptoms (physical, behavioral, or psychological) 1, 5
• PMDD: ≥5 symptoms with at least one severe affective symptom (irritability, mood swings, anger) plus physical/behavioral symptoms 1, 5, 6
• PMDD affects 3-8% of menstruating individuals and carries elevated suicidality risk 6

Differential Diagnosis to Rule Out

Exclude these conditions that can mimic or coexist with PMS:

• Depression and anxiety disorders (symptoms persist throughout cycle)
• Premenstrual exacerbation (PME) of underlying psychiatric disorders—affects 50-60% of those with mood disorders 6
• Menstrual migraine
• Cyclical mastalgia 3
• Thyroid disease, hyperprolactinemia 7

Pathophysiology

PMS results from ovulation and enhanced sensitivity to progesterone in the luteal phase, likely mediated by serotonin dysfunction 4. The condition requires ovulatory cycles—anovulatory women do not experience PMS 2.

Treatment Algorithm

First-Line Approaches (Mild-to-Moderate Symptoms)

Start with lifestyle modifications and non-pharmacologic interventions:

1. Aerobic exercise: Regular physical activity 1, 5, 2
2. Nutritional supplementation with evidence:
   • Calcium supplementation 2
   • Magnesium 2
   • Vitamin B6 2
   • Complex carbohydrate intake 2
3. Cognitive behavioral therapy 1, 5, 2
4. Stress reduction techniques 1

Second-Line: Pharmacologic Treatment (Moderate-to-Severe Symptoms)

For moderate-to-severe PMS/PMDD, selective serotonin reuptake inhibitors (SSRIs) are the treatment of choice 1, 3, 2.

Critical advantage: Most women respond to intermittent, luteal-phase-only SSRI therapy 3. This means:

• Start SSRIs 14 days before expected menstruation
• Continue through day 1-2 of menses
• Stop during follicular phase
• This approach minimizes side effects and medication exposure

Alternative if SSRIs fail or contraindicated:

• Combined oral contraceptives (COCs) containing drospirenone (a spironolactone analog) rather than 19-nortestosterone derivatives 2
• Traditional COCs with 19-nortestosterone progestins may worsen PMS symptoms due to water retention and irritability 2

Third-Line: Ovulation Suppression (Refractory Cases)

Reserve ovulation suppression for women who fail SSRI and COC therapy 3:

1. GnRH agonists with add-back hormonal therapy 2
2. Danazol 2
3. Estradiol patches/implants with progestin for endometrial protection 2

Important caveat: Progestins used for endometrial protection can themselves cause premenstrual-like symptoms (mood swings, bloating, fluid retention) 8. Consider:

• Switching among different progestational agents to minimize symptoms 8
• Micronized progesterone (100-200 mg) may have fewer side effects 8
• Levonorgestrel intrauterine system provides endometrial protection with minimal systemic absorption 8

Last Resort: Surgical Management

Oophorectomy has a very limited role and should only be considered after:

• Failure of all medical therapies
• Documented severe, disabling symptoms
• Completion of childbearing
• Patient fully counseled on permanent nature and need for hormone replacement 3

Common Pitfalls to Avoid

1. Diagnosing PMS without prospective symptom tracking—retrospective recall is unreliable 3, 6
2. Missing PME of underlying psychiatric disorders—these require treatment of the primary condition, not just premenstrual symptoms 6
3. Using traditional COCs with 19-nortestosterone progestins as first-line hormonal therapy—these may worsen symptoms 2
4. Prescribing continuous SSRI therapy when intermittent luteal-phase dosing is equally effective for most patients 3
5. Jumping to ovulation suppression before trying SSRIs—SSRIs are safer and equally effective for most women 3

Special Considerations

Adolescents: The same diagnostic criteria and treatment recommendations apply, though careful consideration of long-term medication use is warranted 1.

Psychological impact: The visible manifestations of hyperandrogenism sometimes associated with ovulatory dysfunction can cause severe anxiety, depression, and social withdrawal 9. Accurate diagnosis and treatment significantly improve psychological well-being.