Orserdu (Elacestrant): A New Hope for Advanced ER+, HER2- Breast Cancer

Understanding Orserdu (Elacestrant) for Advanced Breast Cancer Orserdu, with the active ingredient elacestrant, represents a significant advancement in the treatment of certain types of advanced or metastatic breast cancer. It is a prescription oral tablet belonging to the class of hormone therapy drugs. This medication is specifically designed for adults with estrogen receptor-positive (ER+), HER2-negative breast cancer that harbors a specific gene mutation known as ESR1 mutation. Orserdu is typically prescribed when the cancer has progressed or worsened after prior treatment with another form of hormone therapy. This targeted approach offers a new avenue for patients who may have exhausted other treatment options. What is Orserdu and How Does it Work? Orserdu (elacestrant) functions as a selective estrogen receptor degrader (SERD). It works by targeting and degrading the estrogen receptor (ER) in cancer cells. Estrogen plays a crucial role in the growth of ER-positive breast cancer. By blocking and degrading these receptors, Orserdu helps to slow down or stop the growth of cancer cells that rely on estrogen for survival. This mechanism is particularly important for cancers with the ESR1 mutation, as this mutation can make cancer cells resistant to traditional forms of endocrine therapy. Indications for Use Orserdu is indicated for the treatment of adult patients with advanced or metastatic ER-positive, HER2-negative breast cancer with an ESR1 mutation, after prior endocrine therapy. It is crucial to confirm the presence of the ESR1 mutation through appropriate genetic testing before initiating treatment with Orserdu. Dosage and Administration Orserdu is available as an oral tablet in two strengths: 86 milligrams (mg) and 345 mg. The generally recommended dosage is 345 mg taken once daily. It is important to take Orserdu exactly as prescribed by your doctor. The medication can be taken with or without food. What to Do if You Miss a Dose If you miss a dose of Orserdu by more than 6 hours, you should skip the missed dose. Do not take a double dose to make up for the missed one. Instead, take your next dose at the usual time on the following day. If you are unsure about what to do, it is best to consult your doctor or pharmacist. Potential Side Effects Like all medications, Orserdu can cause side effects, although not everyone experiences them. Side effects can range from mild to serious. It is important to discuss potential side effects with your doctor before starting treatment. Common Mild Side Effects: Nausea Diarrhea Fatigue Abdominal pain Hot flashes Decreased appetite Weight loss Joint pain (arthralgia) Headache Dizziness Cough Shortness of breath Dry mouth Constipation Vomiting Indigestion Muscle pain (myalgia) Increased creatinine in blood tests Increased liver enzymes in blood tests Decreased white blood cell count (leukopenia) Decreased red blood cell count (anemia) Decreased platelet count (thrombocytopenia) Most mild side effects tend to resolve within a few days to a couple of weeks. If they become persistent or bothersome, consult your doctor. Serious Side Effects: While less common, serious side effects can occur. These require immediate medical attention. Allergic Reactions: Signs of an allergic reaction may include rash, itching, hives, swelling of the face, lips, tongue, or throat, and difficulty breathing. If you experience any signs of an allergic reaction, call your doctor immediately. If you believe you are having a medical emergency, call 911 or your local emergency number. Lipid Disorders: Orserdu can affect lipid levels, potentially leading to high cholesterol and high triglycerides. Your doctor will monitor your lipid levels through blood tests. Liver Problems: Elevated liver enzymes can indicate liver issues. Your doctor will monitor your liver function with blood tests. Kidney Problems: Abnormal lab test results may signal kidney problems. Regular monitoring through blood tests is essential. If you experience any severe or concerning side effects, contact your doctor immediately. For medical emergencies, call 911 or your local emergency number. Drug Interactions Orserdu may interact with other medications. It is crucial to inform your doctor about all the medications you are currently taking, including prescription drugs, over-the-counter medicines, vitamins, and herbal supplements. This helps your doctor manage potential interactions and adjust dosages if necessary. Use in Pregnancy and Breastfeeding Orserdu is approved for use in postmenopausal females and adult males. It is not intended for use in females who can become pregnant. If you are a male with a partner who can become pregnant, you should use effective contraception during treatment and for at least 1 week after your last dose. Females who can become pregnant should use effective contraception during treatment and for at least 1 week after their last dose. Discuss contraception options with your doctor. When to Consult a Doctor You should consult your doctor if: You experience any new or worsening symptoms. You have concerns about potential side effects. You need to adjust your medication or have questions about your treatment plan. You suspect you have taken too much Orserdu. In case of overdose, call your doctor or America’s Poison Centers at 1-800-222-1222. If symptoms are severe, seek immediate emergency medical attention by calling 911 or your local emergency number. You are considering or planning to become pregnant or are breastfeeding. Conclusion Orserdu (elacestrant) offers a promising new treatment option for individuals battling advanced ER+, HER2- breast cancer with ESR1 mutations. By understanding its mechanism of action, potential side effects, and proper usage, patients can work closely with their healthcare providers to make informed decisions about their treatment journey. Early

In summary, timely diagnosis, evidence-based treatment, and prevention-focused care improve long-term health outcomes.