Reproductive health
Medicines for Premenstrual syndrome (PMS)
Physical and emotional symptoms in the days before a period that ease once it starts — managed with lifestyle measures first, and, for moderate-to-severe symptoms or its severe form (PMDD), medicines such as SSRIs and hormonal treatment.
Education and reference only. This explains which medicines are used and why, in plain language — it deliberately contains no doses and is not a substitute for advice from your doctor or pharmacist. Always discuss your own treatment with a qualified clinician, and check the BNF and the product labelling for prescribing detail.
Quick answer
What is Premenstrual syndrome (PMS)?
Premenstrual syndrome is a pattern of physical and emotional symptoms that appear in the second half of the menstrual cycle — the days leading up to a period — and settle once the period begins. Symptoms vary widely but commonly include mood changes, irritability, low mood or anxiety, tiredness, bloating, breast tenderness and headaches.
- How it is treated: Treatment is matched to how much the symptoms affect daily life, and usually starts with lifestyle measures and simple self-help.
- Self-care: Regular physical activity, a balanced eating pattern with regular meals, good sleep, limiting alcohol and caffeine, and stress-management techniques can all ease symptoms.
- When to seek help: See your GP if premenstrual symptoms regularly disrupt your work, relationships or daily life, or if mood symptoms are severe — this may point to PMDD, which can be treated.
What it is
Premenstrual syndrome is a pattern of physical and emotional symptoms that appear in the second half of the menstrual cycle — the days leading up to a period — and settle once the period begins. Symptoms vary widely but commonly include mood changes, irritability, low mood or anxiety, tiredness, bloating, breast tenderness and headaches. For most people the symptoms are mild to moderate, but a smaller number experience a severe form called premenstrual dysphoric disorder (PMDD), in which mood symptoms in particular are severe enough to disrupt relationships, work and daily life. What defines the condition is the timing: symptoms recur in the run-up to each period and resolve when it arrives.
How it is treated
Treatment is matched to how much the symptoms affect daily life, and usually starts with lifestyle measures and simple self-help. For physical symptoms, anti-inflammatory pain relief can help discomfort such as cramps, headaches and breast tenderness. For moderate-to-severe symptoms, and for PMDD, antidepressants of the SSRI type are an effective option and can be taken either continuously or only during the second half of the cycle. Combined hormonal contraception can help some women by smoothing out the hormonal changes across the cycle. Keeping a symptom diary over a couple of cycles helps confirm the pattern and check that treatment is working. Severe PMDD deserves a proper assessment, as it can be mistaken for other mood conditions and may need specialist input.
For this condition, these medicines
Medicine classes used for Premenstrual syndrome (PMS)
Each links to a full, dose-free guide — what it is, how it works, who can and cannot use it, side effects, interactions and FAQs.
Symptom checker
Symptoms that can point to Premenstrual syndrome (PMS)
Premenstrual syndrome (PMS) can be one cause of these symptoms. Each guide explains the other possible causes and the red-flag warning signs that mean you should get urgent help:
Beyond medication
Lifestyle and self-care
Regular physical activity, a balanced eating pattern with regular meals, good sleep, limiting alcohol and caffeine, and stress-management techniques can all ease symptoms. Tracking symptoms across the cycle helps you and your clinician see the pattern and judge what is helping.
When to get help
When to see a doctor
See your GP if premenstrual symptoms regularly disrupt your work, relationships or daily life, or if mood symptoms are severe — this may point to PMDD, which can be treated. Seek help urgently if you have thoughts of harming yourself; you can contact your GP urgently, call 111, or call the Samaritans on 116 123.
Not sure how urgent it is? It is always OK to call NHS 111 for advice, day or night.
Answers
Premenstrual syndrome (PMS): frequently asked questions
What medicines are used for premenstrual syndrome?
For physical symptoms, anti-inflammatory pain relief can help. For moderate-to-severe symptoms and for the severe form (PMDD), SSRI antidepressants are an effective option, taken either continuously or only in the second half of the cycle, and combined hormonal contraception helps some women. Lifestyle measures are usually tried first and continue alongside any medicine.
What is the difference between PMS and PMDD?
PMS covers the physical and emotional symptoms many people get before a period, usually mild to moderate. PMDD is a severe form in which mood symptoms — such as marked irritability, low mood or anxiety — are intense enough to seriously disrupt daily life. PMDD deserves proper assessment, as it responds to specific treatments.
Why do antidepressants help PMS if I am not depressed?
SSRIs can ease the mood and irritability symptoms of PMS and PMDD even in people who are not depressed, and they can work specifically around the time symptoms occur. This is a recognised use, separate from treating depression, which is why they may be offered for the premenstrual pattern alone.
How do I know my symptoms are due to PMS?
The key feature is timing: PMS symptoms appear in the days before a period and settle once it starts. Keeping a symptom diary over two or more cycles helps confirm this pattern and rule out other conditions, and gives your clinician a clearer picture to guide treatment.
Sources
Where this is drawn from
- Royal College of Obstetricians and Gynaecologists (RCOG) Green-top Guideline No. 48: Management of premenstrual syndrome.
- NICE CKS: Premenstrual syndrome.
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