Aromasin (Exemestane) — Patient-Friendly Guide (UK)

Aromasin is a brand of the medicine exemestane. It is used to treat certain types of hormone-dependent breast cancer, usually after menopause. This page explains how Aromasin works, how it is taken, what to expect, important safety information, and practical tips for everyday use in the United Kingdom.

This information is for general guidance. Your prescriber and pharmacist will advise you on the best course for your situation.

Basic product information

What is Aromasin and how does it work?

Mechanism of action

Aromasin (exemestane) belongs to a group of medicines called aromatase inhibitors. After menopause, the body’s main source of oestrogen is conversion of androgens into oestrogens in tissues (including fat and muscle), a process driven by the enzyme aromatase.

Exemestane works by lowering oestrogen levels in the body. By reducing oestrogen, it helps slow or stop the growth of oestrogen-receptor positive breast cancer cells, which often rely on oestrogen to grow.

Therapeutic goal

• Reduce the risk of cancer returning in certain early breast cancer situations.
• Control disease progression in advanced or metastatic cases.
• Improve long-term outcomes when used as part of an overall cancer treatment plan.

Pharmacokinetics (how the body handles exemestane)

Pharmacokinetics describes what happens to a medicine from the time you take it until it leaves the body.

• Absorption: Exemestane is absorbed through the gut after swallowing the tablet.
• Metabolism: It is metabolised mainly in the liver.
• Elimination: Metabolites are removed from the body largely through urine and faeces.
• Accumulation: Regular daily dosing leads to stable levels over time.
• Half-life: The drug’s activity is maintained sufficiently to support once-daily dosing (exact values can vary by patient and study conditions).

If you have liver or kidney problems, your healthcare team may monitor you more closely and adjust your plan as needed.

Typical use in the UK

In the UK, Aromasin is used for postmenopausal women with certain types of breast cancer, commonly where the cancer is oestrogen-receptor positive.

Your treatment plan may include Aromasin as:

• Adjuvant therapy (treatment after primary surgery) to reduce recurrence risk.
• Sequential therapy (switching to exemestane after an initial period on another endocrine medicine).
• For advanced disease where hormone-driven growth is involved.

Indications (when it may be used)

Aromasin is indicated for:

• Early breast cancer in postmenopausal patients, after initial treatment, to help reduce the chance of recurrence.
• Advanced breast cancer in postmenopausal patients, particularly when the cancer is hormone-dependent.
• Locally advanced or metastatic disease that has responded to or progressed after earlier hormone treatments.

The exact eligibility depends on factors such as your tumour receptor status, prior treatments, and overall clinical assessment.

Dosing and timing

Usual dose

A common regimen is one 25 mg tablet once daily.

Timing of your dose

• Try to take your tablet at the same time each day.
• Many people choose a time that helps them remember, such as with breakfast or dinner.

How long will you take it?

Treatment duration varies. Some people use exemestane for a period of years as part of a longer-term strategy to reduce recurrence risk. Your prescriber will advise a personalised duration.

If you forget a dose

• Take it as soon as you remember on the same day.
• If it is close to the time for your next dose, skip the missed dose.
• Do not take a double dose to make up for a missed tablet.

Food interactions and what to eat

Food

Aromasin should generally be taken after food (for example, with or after a meal). Taking it with food may improve tolerability and absorption for some people.

There are no specific “forbidden” foods, but maintaining a balanced diet is important—particularly because aromatase inhibitors can contribute to bone thinning and changes in cholesterol or metabolism in some individuals.

Grapefruit and similar foods

Grapefruit interactions are more typical with certain other medication families. However, if you regularly use high-dose fruit supplements or herbal products, it’s sensible to ask your pharmacist—especially because people’s medication lists vary.

Alcohol and medicine interactions

Moderate alcohol use is not always strictly prohibited with exemestane, but alcohol can worsen side effects such as hot flushes, sleep disturbance, and fatigue in some people. Alcohol may also affect how well you manage other health conditions.

Practical guidance

• If you drink alcohol, consider keeping it moderate and monitor for symptom changes.
• Avoid heavy or binge drinking, particularly if you experience dizziness, nausea, or sleep disruption.

Important medicine interactions

Exemestane can interact with medicines that strongly affect liver enzymes. Tell your pharmacist about all medicines you take, including:

• Herbal supplements (for example, St John’s wort).
• Medicines for fungal infections or certain antibiotics/antivirals.
• Other hormone therapies or endocrine medicines.
• Medicines that affect liver metabolism.

Your pharmacist can check for specific interactions based on your medication list.

Safety profile: common and serious side effects

Like all medicines, Aromasin can cause side effects. Many are manageable, and your healthcare team can offer strategies to reduce discomfort.

Common side effects

• Hot flushes
• Joint pain or stiffness (sometimes called arthralgia)
• Headache
• Fatigue or tiredness
• Nausea in some people
• Muscle pain (myalgia)
• Vaginal dryness or changes in vaginal comfort
• Skin reactions (for example, rash in some cases)
• Sweating

Effects on bones (important)

Aromatase inhibitors can reduce oestrogen levels, which may lead to bone thinning (osteoporosis) and increased fracture risk. People may be advised to:

• Have bone density scans (for example, DXA scans)
• Use calcium and vitamin D if appropriate
• Consider weight-bearing exercise where suitable
• Discuss bone-protective medicines if risk is significant

Serious side effects — seek urgent help

Contact urgent medical services or seek urgent advice if you experience:

• Signs of an allergic reaction (swelling of face/lips, difficulty breathing, severe rash)
• Chest pain, sudden breathlessness, or symptoms of a blood clot
• Severe or persistent symptoms that worry you

If you are unsure whether symptoms are serious, consult a healthcare professional promptly.

Practical use tips (to make treatment easier)

• Take it consistently after food: Choose a daily routine (e.g., after breakfast or dinner).
• Track side effects: Note when joint pain or hot flushes happen; this helps your clinician adjust supportive care.
• Support bone health: Ask about calcium/vitamin D, exercise, and whether you need a bone density assessment.
• Manage joint discomfort: Gentle stretching, physiotherapy, warm baths, or suitable pain relief (as advised by your clinician) can help.
• Vaginal dryness support: Non-hormonal moisturisers/lubricants may help. If you are considering vaginal hormonal products, discuss with your specialist first.
• Use symptom-friendly clothing and hydration: Fans, breathable clothing, and drinking water can reduce discomfort from hot flushes.
• Stay active where possible: Light-to-moderate activity improves stiffness, mood, and overall wellbeing.

If side effects become difficult to manage, do not stop the medicine on your own—talk to your prescriber or pharmacist.

Missed dose, missed day, and restarting

If you miss one dose, follow the guidance above. If you miss several days, contact your pharmacist or prescriber for advice rather than restarting “as if nothing happened”. Your individual plan may include specific steps to re-establish tolerability.

Alternative options (what else might be used)

Depending on your cancer type, prior treatments, and tolerance, doctors may consider other endocrine therapies. Alternatives can include:

• Other aromatase inhibitors such as anastrozole or letrozole.
• Tamoxifen (a selective oestrogen receptor modulator).
• Oestrogen suppression therapies (particularly in premenopausal patients, usually with other agents).
• Fulvestrant (a different type of endocrine therapy) in selected circumstances.
• Supportive or complementary treatments for side effects (for example, bone-protection strategies and symptom relief).

Your best alternative depends on your medical history, tumour biology, and the reason Aromasin was chosen for you.

Market and legal context in the UK

In the United Kingdom, Aromasin (exemestane) is a regulated medicine and forms part of standard care for eligible patients with hormone receptor-positive breast cancer. Supply and dispensing are governed by UK healthcare regulations and pharmacy standards.

Availability can vary by formulation and manufacturer batches. Online pharmacies in the UK operate under strict rules for safe supply, quality checks, and customer safety.

Recent guidance and monitoring (general)

While specific guidance may evolve, current clinical practice generally emphasises:

• Bone health monitoring and assessment of fracture risk.
• Ongoing evaluation of side effects to improve adherence and quality of life.
• Medicines optimisation to reduce interaction risks.
• Regular review as part of survivorship and ongoing cancer care.

For the most up-to-date clinical guidance, healthcare professionals typically refer to sources such as NHS pathways and cancer clinical guidelines.

Delivery and availability (UK)

Availability of Aromasin depends on stock levels and the timing of deliveries. Many online pharmacies offer:

• Standard delivery and, where available, tracked delivery.
• Packaging designed to protect tablets during transit.
• Customer support for ordering queries and delivery updates.

When ordering, check the strength and pack size, and ensure the correct product is selected. If you are unsure whether Aromasin is the right medicine for you, speak with a healthcare professional before use.

FAQ about Aromasin (Exemestane)

1) What is Aromasin used for?

Aromasin (exemestane) is used as hormone (endocrine) therapy for certain types of breast cancer in postmenopausal patients, especially where the cancer is hormone receptor-positive.

2) How should I take Aromasin?

A common regimen is one 25 mg tablet once daily, generally after food. Try to take it at the same time each day.

3) What should I do if I miss a dose?

Take it when you remember on the same day. If it’s nearly time for the next dose, skip the missed tablet. Do not take a double dose.

4) Can I take Aromasin with food?

Yes. It’s generally recommended to take Aromasin after food. This may improve absorption and tolerability.

5) Are there alcohol restrictions?

There is no universal “no alcohol” rule, but alcohol may worsen symptoms like hot flushes or fatigue in some people. Keep alcohol moderate and monitor how you feel.

6) What medicines should I avoid?

Some medicines and supplements can affect metabolism or cause interactions. Always tell your pharmacist about all medicines you use—including herbal products and over-the-counter remedies—so they can check for interactions.

7) Will Aromasin affect my bones?

It can. Lower oestrogen levels may increase bone thinning risk. Bone density monitoring and bone-protective strategies may be advised.

8) What side effects are most common?

Common side effects include hot flushes, joint pain, fatigue, headaches, nausea, muscle pain, and vaginal dryness.

9) When should I seek urgent medical help?

Seek urgent advice if you suspect an allergic reaction (swelling, breathing difficulty), experience severe symptoms, or develop concerning signs such as chest pain or sudden breathlessness.

10) What are common tips to reduce side effects?

Consistency with timing and food, staying active, managing joint symptoms with supportive care, and following bone health advice (exercise, calcium/vitamin D if appropriate, and any monitoring) can help.

If you have further questions about Aromasin, your pharmacist can help with practical advice on use, side-effect management, and checking interactions based on your personal medicine list.