Managing advanced prostate cancer often involves lowering testosterone levels to slow disease progression. This comprehensive Rexigo 120mg treatment guide explains how this oral prescription drug works, proper dosing schedules, potential side effects, and essential drug safety precautions.
What Is Rexigo 120mg?
Rexigo is an oral prescription drug containing relugolix (120mg), a gonadotropin-releasing hormone (GnRH) receptor antagonist. It provides a daily tablet alternative to traditional injectable hormone therapies for adults with advanced hormone-sensitive prostate cancer.
How Does It Work?
Unlike LHRH agonist implants, relugolix directly blocks the GnRH receptors in the pituitary gland. This action suppresses testosterone production rapidly without causing an initial hormone surge (“flare”). Furthermore, because it is an oral prescription drug, testosterone levels tend to recover faster if treatment is permanently discontinued compared to long-acting implants.
Who Is It Prescribed For?
Adults diagnosed with advanced hormone-sensitive prostate cancer.
Must be prescribed and monitored by an oncologist or urologist specializing in cancer care.
Rexigo 120mg Treatment Guide: Dosage and Administration
Adhering strictly to the administration steps in this Rexigo 120mg treatment guide is vital for maintaining steady testosterone suppression:
Day 1 Loading Dose: Treatment begins with a single loading dose of three 120mg tablets (360mg total) on the first day.
Daily Maintenance Dose: Take one 120mg tablet once daily thereafter, at approximately the same time each day.
Administration: Swallow the tablet whole, with or without food.
What If You Miss a Dose?
Single Missed Dose: Take the missed tablet as soon as you remember on the same day.
Multiple Missed Doses: If you miss more than one dose in a row, contact your doctor immediately. Missing multiple doses allows testosterone levels to recover quickly, which can affect your treatment outcome.
Potential Side Effects to Expect
Because relugolix suppresses male sex hormones, patients may experience side effects related to androgen deprivation.
Common Side Effects
Hot flashes and flushing
Persistent fatigue and low energy
Diarrhea
Musculoskeletal pain (joint or muscle aches)
Serious Side Effects (Seek Immediate Medical Care)
Cardiovascular Issues: Signs of heart problems, including chest pain, irregular heartbeat (QT prolongation), or shortness of breath.
Mood Disturbances: Severe depression, anxiety, or noticeable mood changes.
Liver Dysfunction: Signs of liver toxicity, such as yellowing of the skin/eyes (jaundice), dark urine, or upper abdominal pain.
Strict Daily Compliance: Because relugolix is taken daily, consistent adherence is critical. Unlike long-acting injectables, missing tablets for even a few days can cause testosterone levels to bounce back.
Cardiovascular Risks:Relugolix should be used with caution in patients with a history of heart disease, electrolyte imbalances, or underlying heart rhythm disorders.
Drug and Food Interactions
Inform your doctor and pharmacist of all prescription medications, over-the-counter drugs, and dietary supplements you take. Key interactions include:
P-glycoprotein (P-gp) Inhibitors/Inducers: Medicines affecting the P-gp transporter protein in the gut can alter relugolix absorption.
Antacids & Minerals: Certain mineral-containing antacids may interfere with drug absorption; consult your pharmacist regarding spacing times.
Storage Conditions
Store below 30°C (86°F) in the original packaging.
Keep protected from direct sunlight and excess moisture.
Keep safely out of reach of children and pets.
Frequently Asked Questions
Why is there a loading dose on day one?
As highlighted in this Rexigo 120mg treatment guide, the 360mg loading dose on the first day rapidly suppresses testosterone levels right from the start of therapy, bypassing the delay seen with traditional treatments.
What happens if I forget several days in a row?
Your body will start producing testosterone again, potentially feeding cancer cell growth. Contact your oncology care team promptly if you have skipped multiple doses so they can advise you on how to safely restart.
This article is reviewed by Pharmacist Sesan Kareem, B.Pharm, MPA, MBA and is for educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always take medicines exactly as prescribed by your doctor. Chat with a HubPharm pharmacist on WhatsApp with any questions before starting, stopping, or changing a medicine.
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