Anastrozole: What it is and what you need to know
Anastrozole is an aromatase inhibitor used mainly for hormone receptor–positive breast cancer in postmenopausal women. It lowers estrogen production, which slows growth of some breast cancers. If your doctor mentioned anastrozole, here’s a clear, practical guide to how it’s used, common side effects, monitoring needs, and how to avoid risky online purchases.
How it’s used and typical dosing
Doctors usually prescribe anastrozole as 1 mg taken once daily by mouth. It’s commonly given after surgery or radiation, or when cancer is advanced and driven by hormones. Treatment courses often last five years, sometimes longer depending on your oncologist’s plan and response. It’s intended for postmenopausal patients; it’s not suitable for premenopausal women unless ovarian suppression is used alongside it.
Side effects, risks, and monitoring
Common side effects include hot flashes, joint or muscle pain, fatigue, and mood changes. One important risk is bone loss — anastrozole can lower bone density over time, so doctors often order a DEXA scan before or during treatment and may recommend calcium, vitamin D, or prescription bone-protecting therapy if needed. Report new or worsening joint pain, severe fatigue, or mood changes right away.
Other things your care team will watch: blood lipids (it can affect cholesterol in some people) and any signs of cardiovascular issues. Don’t combine anastrozole with estrogen-containing products — that cancels its effect. Tell your doctor about other meds and supplements so they can check for interactions.
If you experience unusual bleeding, severe bone pain, shortness of breath, or signs of a serious allergic reaction, seek medical help immediately. Keep regular follow-ups so your team can adjust treatment and manage side effects.
Thinking about alternatives? Letrozole and exemestane are other aromatase inhibitors with similar goals; the choice depends on side effects, past treatments, and your doctor’s judgment.
Can you take anastrozole with tamoxifen? Usually not at the same time — they work differently and are chosen based on menopausal status and treatment goals. Your oncologist will explain sequencing or switching if needed.
Buying tips and safety for online purchases
Anastrozole is prescription-only in many countries. If shopping online, use only licensed pharmacies that require a valid prescription and show clear contact information. Avoid sites that sell without prescriptions, offer suspiciously low prices, or hide company details. Check for UK/US pharmacy registration where applicable, read real reviews, and confirm packaging and lot numbers when you receive meds.
Final practical tip: keep an up-to-date list of your medications, lab tests, and symptoms. Bring it to appointments so your care team can spot problems early and keep your treatment on track.
