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Femara

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Femara (letrozole) is an aromatase inhibitor used primarily in the treatment of hormone-responsive breast cancer in postmenopausal women. It works by decreasing the amount of oestrogen the body produces, which can slow or stop the growth of certain types of cancer cells that require oestrogen to grow.


Ingredient
Availability
In Stock
Delivery Time
Airmail (14-21 days) | EMS trackable (5-9 days)
Product is shipped in a fully discreet envelope with no content disclosure, including all required documentation inside

Product Sheet

Active Ingredient(s)
Letrozole
Reference Brand
Femara
Manufacturer
Novartis
Product Form
Tablet
Regulatory Classification
Rx
Primary Category
Cancer Treatment, Women's Health
Product Category
Antineoplastic Agents, Aromatase Inhibitors
Pharmacological Class
Non-steroidal aromatase inhibitor
Manufacturer Description
Femara is a hormone-based therapy used primarily to treat breast cancer in women who have gone through menopause.
Mechanism of Action
In postmenopausal women, many breast cancers are fuelled by oestrogen. This medication inhibits the enzyme aromatase, which responsible for producing oestrogen in the body, thereby slowing or stopping the growth of cancer cells.
Route of Administration
Oral
Onset Time
Steady state reached in 2-6 weeks
Duration
48 hours
Contraindications
Premenopausal status, Pregnancy, Severe liver disease
Severe Adverse Events
Osteoporosis, Bone fractures, Blood clots, Stroke, Heart attack
Common Side Effects
Hot flushes, Night sweats
Uncommon Side Effects
Joint pain, Fatigue, Increased cholesterol, Headache
Drug Interactions
Tamoxifen, Oestrogen-containing therapies
Pregnancy Safety Warnings
Contraindicated; can cause foetal harm.
Age Restrictions
Adult women (typically postmenopausal)
Storage Guidelines
Store at room temperature in the original packaging.
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Femara FAQ

Can Femara be used for fertility treatment?

Letrozole is sometimes prescribed off-label to induce ovulation in women with polycystic ovary syndrome. Clinical evidence suggests it can be as effective as traditional agents, but treatment should be supervised by a fertility specialist.

What should I do if I miss a dose of Femara?

Take the missed tablet as soon as you remember on the same day. Do not take two tablets on the following day to compensate.

Does taking Femara affect cholesterol levels?

Letrozole may cause a modest increase in LDL cholesterol. Regular lipid monitoring is advisable, especially for patients with existing cardiovascular risk factors.

Are there any dietary restrictions while on Femara?

No specific food interactions are known. The tablet can be taken with or without meals, but maintain a balanced diet to support overall health.

How long is a typical course of Femara therapy?

For adjuvant treatment of post-menopausal breast cancer, therapy is commonly continued for up to five years, as directed by the oncology team.

Can I travel abroad with Femara tablets?

Yes, but keep the medication in its original packaging with the prescription label. Carry a copy of the prescription in case customs officials request documentation.

What are the signs of serious liver injury while on Femara?

Watch for yellowing of the skin or eyes, dark urine, severe abdominal pain, or unexplained fatigue. Seek urgent medical care if these symptoms appear.

Is it safe to take Femara while on other hormone therapies?

Concurrent estrogen-containing treatments can negate the effect of letrozole and are not recommended. Discuss any hormonal supplements with your doctor.

How does Femara compare to other aromatase inhibitors like anastrozole?

Both drugs lower estrogen, but letrozole is often considered slightly more potent on a per-milligram basis. Choice of agent depends on individual tolerance, side-effect profile, and physician preference.

What should I know about bone health while using Femara?

Because estrogen reduction can accelerate bone loss, baseline and periodic bone density scans are recommended. Calcium and vitamin D supplementation, along with weight-bearing exercise, may help mitigate this risk.

What is Femara?

Femara contains letrozole as its active component. It is classified under women’s health and oncology support, primarily used as an aromatase inhibitor in hormone-responsive breast cancer. The medication is available as a 2.5 mg oral pill and is prescription-only (Rx) in the United Kingdom. Letrozole is marketed by Novartis under the brand name Femara and is regulated by the Medicines and Healthcare products Regulatory Agency (MHRA).

How Femara Works in the Body

Letrozole belongs to the aromatase inhibitor class. Aromatase is an enzyme that converts androgens into estrogen; by blocking this enzyme, letrozole markedly reduces circulating estrogen levels. Lower estrogen deprives estrogen-receptor-positive breast cancer cells of a growth stimulus, slowing tumor progression. The drug is absorbed rapidly after oral administration, reaching peak plasma concentrations within 2 hours. It is metabolised mainly by the liver (CYP3A4, CYP2A6) and eliminated in urine and feces with a half-life of about 2 days.

Conditions Treated by Femara

  • Hormone-receptor-positive breast cancer in post-menopausal women (approved by the MHRA).
  • Adjuvant therapy following surgery to reduce the risk of cancer recurrence.
  • Advanced or metastatic disease where estrogen suppression is required.

Femara is indicated for adult women who have completed menopause, either naturally or surgically, because the drug’s mechanism relies on the absence of ovarian estrogen production.

Evidence-Based Off-Label Uses

Fertility Induction in Ovulation Disorders

Letrozole is sometimes used off-label to stimulate ovulation in women with polycystic ovary syndrome (PCOS). Small-scale clinical studies have shown comparable pregnancy rates to clomiphene citrate, and the practice is reflected in some fertility guidelines. Off-label use requires medical supervision and individualized risk assessment.

Who Should Not Use Femara?

Absolute Contraindications

  • Known hypersensitivity to letrozole or any excipients in the pill.
  • Pregnancy or current breastfeeding.
  • Pre-menopausal status (the drug does not provide effective estrogen suppression before menopause).

Relative Contraindications

  • Severe hepatic impairment (dose adjustment may be needed).
  • History of cardiovascular disease, uncontrolled hypertension, or thromboembolic disorders.
  • Osteoporosis or low bone mineral density (estrogen reduction can accelerate bone loss).

Special Populations

  • Pregnancy/Lactation: Femara is contraindicated; any accidental exposure requires immediate medical advice.
  • Elderly: No specific dosage change, but monitor for increased fracture risk.
  • Renal Impairment: No dose adjustment is required, but caution is advised in severe cases.

Safety Profile: Side Effects and Interactions

Common Side Effects

  • Hot flashes and night sweats.
  • Joint or muscle aches, often described as arthralgia.
  • Fatigue and mild nausea.
  • Slight increase in cholesterol levels.

These effects are generally mild and may improve with continued therapy or symptom-specific management.

Serious Adverse Events

  • Bone loss leading to fractures - regular bone mineral density monitoring is recommended.
  • Severe liver injury - indicated by jaundice, dark urine, or persistent abdominal pain.
  • Cardiovascular events - rare but possible; patients with pre-existing heart disease should be evaluated carefully.

Drug Interactions

  • Major: Strong CYP3A4 inhibitors (e.g., ketoconazole, itraconazole) can raise letrozole concentrations; monitoring or dose modification may be needed.
  • Moderate: CYP2A6 inducers (e.g., rifampicin) may lower letrozole levels, potentially reducing efficacy.
  • Hormonal agents: Combining with estrogen-containing therapies (e.g., hormone replacement therapy) counteracts the intended estrogen suppression.

Food and Lifestyle Interactions

  • Take Femara with water; food does not significantly affect absorption.
  • Alcohol consumption does not alter drug levels but may exacerbate liver toxicity in susceptible individuals.
  • No specific restrictions on driving, but patients experiencing severe joint pain should assess their ability to operate machinery safely.

How to Take Femara

  • Standard dosing: One 2.5 mg tablet taken orally once daily, preferably at the same time each day.
  • Missed dose: Take the missed tablet as soon as remembered on the same day; do not double the dose.
  • Overdose: Symptoms may include severe nausea, vomiting, or dizziness. Seek immediate medical attention; supportive care is the mainstay of treatment.
  • Administration: Swallow the pill whole; do not crush or chew. Store at room temperature, away from moisture and direct sunlight.
  • Discontinuation: In many treatment plans, therapy may be continued for 5 years. Stopping abruptly without professional guidance is discouraged; tapering is rarely required but may be considered based on clinical judgment.

Monitoring and Follow-Up

  • Baseline assessments: Liver function tests, lipid profile, and bone mineral density (DEXA scan).
  • Routine monitoring: Liver enzymes every 3 months, cholesterol every 6 months, and periodic bone density checks (annually).
  • Clinical review: Evaluate for joint pain, hot flashes, and any new cardiovascular symptoms at each oncology follow-up visit.
  • When to contact a healthcare provider: Persistent severe joint pain, signs of liver dysfunction, unexpected fractures, or any allergic reaction.

Storage and Handling

  • Keep the bottle tightly closed and store at 20-25 °C (68-77 °F).
  • Protect from moisture and light; do not refrigerate.
  • Keep out of reach of children; use a child-proof container.
  • Dispose of unused tablets according to local pharmacy guidelines or the Medicines Disposal Programme.

Medication-Specific Glossary

Aromatase Inhibitor
A drug class that blocks the enzyme aromatase, preventing the conversion of androgens to estrogen.
Estrogen Receptor-Positive (ER+)
Tumors that grow in response to estrogen; they are the primary target of letrozole therapy.
Bone Mineral Density (BMD)
A measurement of the amount of mineral matter per square centimetre of bone; reduced BMD indicates higher fracture risk.
Menopausal Status
Classification of a woman as pre-menopausal, peri-menopausal, or post-menopausal, influencing the suitability of letrozole therapy.

Medical Disclaimer

This article provides educational information about Femara and is not a substitute for professional medical advice. Treatment decisions, including use for unapproved indications, must be made under the guidance of a qualified healthcare provider. The content is intended for informational purposes and does not constitute medical recommendations. Always consult a physician before starting, stopping, or changing any medication regimen.

Information for Femara is sourced from established medical standards and updated frequently. It is provided for general guidance and should be confirmed with a healthcare professional before use.
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Our Projects: Information on Oncology Support - Letrozole Breast Cancer Aromatase Inhibitor