Open Source Apothecary At Home / Urinary and reproductive

PMS and PMDD

Vitex and calcium have trials. PMDD is a different, more serious diagnosis and needs clinical care.

remedy

Premenstrual syndrome is a cluster of physical and emotional symptoms in the luteal phase that resolves with menstruation. Premenstrual dysphoric disorder (PMDD) is a more severe, recognised condition with significant mood symptoms and functional impairment, and it is a different diagnosis with different treatment.

The diagnostic point that matters. The symptoms must be cyclical and confined to the luteal phase, and the way to establish that is a prospective daily symptom diary over 2-3 cycles, not recollection. Many things that get called PMS — depression, thyroid disease, anaemia, perimenopause — are not cyclical, and the diary is what separates them. This is the most useful single action on the page.

Vitex agnus-castus (chasteberry) has several randomised trials showing improvement in premenstrual symptoms over placebo, and it is the best-studied herb for PMS. It works on dopaminergic pathways and can affect prolactin. Cautions: it can interfere with hormonal contraception's effectiveness in some reports by altering prolactin, it should not be used in pregnancy, and it should not be combined with dopamine-related drugs.

Calcium at 1000-1200 mg daily has randomised evidence for premenstrual symptoms, which is an unusually well-supported nutrient intervention.

Evening primrose oil has been used for decades and the trials are largely negative.

For PMDD specifically, the treatments with evidence are SSRIs (which can be taken continuously or only in the luteal phase, and which work faster in PMDD than in depression), a specific combined oral contraceptive, and GnRH analogues in severe cases. A person with significant premenstrual mood symptoms, especially with hopelessness or suicidal thoughts, needs clinical care. This is not a supplement situation.

Other measures with evidence. Aerobic exercise, reducing caffeine and alcohol, adequate sleep, and cognitive behavioural approaches.

What the studies found

Preparation

Vitex (chasteberry)

• 20-40 mg daily of a standardised extract, or 1-2 g of dried fruit
• Trials show benefit for premenstrual symptoms
• Take it continuously, not just in the luteal phase
• Allow 2-3 cycles
• Not in pregnancy. Not with hormonal contraception without advice. Can affect prolactin and dopamine-related drugs.

Calcium

• 1000-1200 mg daily from diet and supplement combined
• Randomised evidence for premenstrual symptoms
• Do not exceed the recommended intake

Magnesium and vitamin B6

• Small trials; weak evidence
• Do not take high-dose B6 — it causes neuropathy. Stay under 100 mg daily.

Evening primrose oil

• Trials largely negative. Harmless, and unlikely to help.

The measures with evidence

• A prospective daily symptom diary for 2-3 cycles. This is the diagnostic step and the most useful thing on the page.
• Aerobic exercise
• Reduce caffeine and alcohol
• Adequate sleep; consistent sleep and wake times
• CBT has evidence for PMS

PMDD

• SSRIs, continuous or luteal-phase only — effective and a clinician's decision
• A specific combined oral contraceptive (drospirenone/ethinylestradiol) has evidence
• GnRH analogues in severe cases
• This is not a supplement situation. Get clinical care.

What else is worth checking

• Thyroid function, iron, and depression, because none of those are cyclical and all mimic PMS

Cautions and interactions

• Vitex can affect prolactin and may interfere with hormonal contraception. Discuss before starting.
• Do not use vitex in pregnancy.
• High-dose vitamin B6 causes neuropathy. Stay under 100 mg daily.
• PMDD with significant mood symptoms or suicidal thoughts needs clinical care.
• Do not treat non-cyclical symptoms as PMS — the diary separates them.

When this is not a self-care problem — get help

• Suicidal thoughts, significant mood disturbance, or inability to function premenstrually — clinical care promptly. In the US, call or text 988 for crisis support.
• Symptoms that are not cyclical — assessment for thyroid disease, anaemia or depression.

Related

• Painful periods (dysmenorrhoea)
• Menopause: hot flushes and the honest evidence
• Low mood and depression
• Heavy periods

Sources

1. Effect of Saffron Versus Selective Serotonin Reuptake Inhibitors (SSRIs) in Treatment of Depression and Anxiety: A Meta-analysis of Randomized Controlled Trials. Nutrition reviews 2025; doi:10.1093/nutrit/nuae076 PubMed 38913392
2. Comparative efficacy and tolerability of nutraceuticals for depressive disorder: A systematic review and network meta-analysis. Psychological medicine 2025; doi:10.1016/j.cell.2015.02.047 PubMed 40314175
3. Selective serotonin reuptake inhibitors for premenstrual syndrome and premenstrual dysphoric disorder. The Cochrane database of systematic reviews 2024; doi:10.1002/14651858.CD001396.pub3 PubMed 39140320
4. New horizons for the study of saffron (Crocus sativus L.) and its active ingredients in the management of neurological and psychiatric disorders: A systematic review of clinical evidence and mechanisms. Phytotherapy research : PTR 2024; doi:10.1002/ptr.8110 PubMed 38424688
5. A scoping review of hormonal clinical trials in menstrual cycle-related brain disorders: Studies in premenstrual mood disorder, menstrual migraine, and catamenial epilepsy. Frontiers in neuroendocrinology 2023; doi:10.15585/mmwr.mm6631a1 PubMed 37619655