Table of Contents
What Is Megestrol Acetate?
Megestrol acetate is a progesterone-related compound that has been used primarily for its ability to stimulate appetite and promote weight gain in patients with malnutrition due to chronic disease, cancer, or human immunodeficiency virus wasting. Megestrol acetate is also indicated in hormone-sensitive malignancies, including breast or endometrial cancer (cancer that occurs in the inner lining of the uterus), where it is used to slow the progression of the tumor by modulating hormonal influences.
The drug is administered orally once a day, depending on the underlying medical condition. Some of the common side effects of this drug include weight gain, fluid retention, and changes in blood sugar levels.
How Does Megestrol Acetate Work?
Megestrol acetate is a man-made form of the progesterone hormone. Progesterone is one of the female hormones, but men also produce a small amount of this hormone. Hormones are natural products that are produced by glands in our body. They are transported around our body in our bloodstream and act as a message from one part of our body to another. The medication functions as an appetite stimulant and calorie intake enhancer, which may lead to weight gain.
Some cancers feed on hormones to grow or develop. This means that the cancer is hormone sensitive or hormone dependent. Megestrol acetate can affect the balance of the hormone levels in the body so that the body produces less of the hormones that some cancers need to develop. It can also affect other hormones or directly affect the cancer to prevent it from growing.
Megestrol Acetate Treatment Used For
Megestrol acetate is prescribed as a treatment to help patients who have lost a significant amount of weight due to cancer, chronic illness, or other medical conditions regain their appetite and gain weight. This is accomplished by increasing caloric intake and boosting appetite.
Megestrol Acetate may be used to contribute to the slowing down of the progression of hormone-sensitive cancers, including breast or endometrial cancer. The patients taking the drug are carefully monitored for any side effects, which include fluid retention, changes in blood sugar levels, and hormonal changes.
Dosage and Administration of Megestrol Acetate
The doctor establishes the dosage of the medication, which is taken orally once daily, based on the patient's condition and response to treatment. The dosage of this medication may differ from one person to another. You should follow the instructions of your doctor or read the instructions on the label. If your dosage is different, you should not change it unless your doctor advises you to do so. In all cases, it is essential to take Megestrol Acetate as directed by a physician. The average dosage for this medication is included in the following details.
Tablets
Breast Cancer (In Adults): 40 mg (milligrams) four times a day for at least two months.
Uterine Cancer (In Adults): 40 to 320 mg daily, given in divided doses, for at least two months.
Children: Dosage is determined by the physician.
Oral Suspension
Loss of Appetite or Weight Loss in Acquired Immunodeficiency Syndrome (Adults): 625 mg (5 milliliters) once a day.
Children: Dosage is determined by the physician.
What Are the Common Side Effects of Megestrol Acetate?
Common Side Effects:
Weight Gain and Increased Appetite: When taking this medication, patients frequently experience increased appetite and weight gain. After stopping it, the appetite should return to normal.
Hot Flashes and Sweats: During treatment, you may experience sudden warmth in your face and neck, accompanied by sweating, irritability, or anxiety.
Breathlessness: During treatment, some patients experience dyspnea (difficulty in breathing).
Changes in Face or Appearance: A rounded, swollen, puffy, or “moon” face may develop.
High Blood Pressure: Blood pressure should be monitored frequently, as it may increase.
High Blood Sugar Levels: It can lead to symptoms like thirst or blurred vision. Individuals with diabetes might require more careful observation.
Serious Side Effects
Feeling Sick (Nausea): Nausea may occur in some individuals while taking Megestrol Acetate. Eating small meals and avoiding oily and spicy foods can help.
Diarrhea: Loose stools can occur during treatment. Staying hydrated is important, and medical advice should be taken if diarrhea becomes severe or long-lasting.
Increased Tiredness: You may feel more tired than usual. This can continue for some time even after stopping the medicine. Adequate rest and pacing daily activities can help.
Mood Changes: Low mood, irritability, or emotional changes may occur. If mood symptoms are persistent or troubling, speak to a healthcare professional.
Problems with Memory or Concentration: Some people notice difficulty focusing or remembering things during treatment. This usually improves after the medicine is stopped.
Fluid Retention (Swelling): Swelling of the feet, ankles, or hands may occur because of fluid retention. If swelling becomes uncomfortable or sudden, inform your doctor.
Skin Changes: Dry skin, itching, or rashes may occur. Inform your doctor about severe or worsening skin conditions.
Hair Changes: Hair may become thinner or drier. However, significant hair loss is rare, and this condition is reversible.
Bone Pain Flare: If cancer has spread to the bones, bone pain may temporarily worsen at the start of treatment. Pain relief medicines can help manage this.
High Blood Pressure: Megestrol Acetate may increase blood pressure in some people. Regular monitoring may be required, especially if you already have hypertension.
Reduced Sex Drive: A decrease in sexual interest may occur during treatment. This is usually temporary.
Menstrual Changes: Periods may become irregular or stop altogether. In some cases, menopause may occur earlier than expected.
Megestrol Acetate Precautions
The following are the precautions while taking Megestrol acetate:
Follow the medication as directed. Megestrol Acetate tablets should be taken whole with a glass of water at the same time every day to ensure that the medication is effective.
Inform your doctor about other medications you are taking. Some medications may interact with Megestrol Acetate and cause adverse reactions. It is important to inform your healthcare provider about all the medications you are taking.
Inform your doctor about allergies and past health problems. Do not take this medication if you are allergic to Megestrol Acetate or any of the ingredients in the tablet. Inform your doctor about any past health problems you may have experienced, such as blood clots, liver conditions, or diabetes (increased blood sugar level).
When to Seek Help?
Severe or Sudden Swelling: If you see swelling in your hands, feet, or ankles that occurs suddenly or is painful, you should contact your healthcare provider right away. This could be a sign of fluid retention or a severe reaction.
Signs of Blood Clots: You should see your doctor right away if you have leg pain, redness, or swelling, or if you have chest pain, shortness of breath, or blood in your cough. These are symptoms of deep vein thrombosis or pulmonary embolism.
High Blood Sugar Symptoms: If you have extreme thirst, urination, blurred vision, or fatigue, you should contact your healthcare provider right away. These are symptoms of high blood sugar or complications from diabetes.
Severe Nausea or Vomiting: If you have persistent or worsening nausea, vomiting, or difficulty keeping fluids down, you should seek advice from your healthcare provider right away to avoid dehydration or malnutrition.
Unexpected or Severe Mood Changes: You should contact your healthcare provider right away if you are experiencing severe mood swings, depressive symptoms, or suicidal thoughts.
Skin Reactions: If you have a rash that spreads quickly, severe itching, or peeling skin, you should contact your healthcare provider right away.
Conclusion
Megestrol is a man-made form of the human hormone progesterone. Megestrol tablets are used to help patients with advanced endometrial cancer (cancer that starts in the uterine lining) and advanced breast cancer. Megestrol works by acting on the female hormones that stimulate cancer growth. You can consult a cancer specialist to know more.
Key Takeaways
Megestrol acetate is primarily prescribed to patients who have lost weight due to cancer or other illnesses to help them regain their appetite and weight.
It acts on the hormonal system, which helps in coping with the symptoms of hormone-responsive cancers but can also cause alterations in menstrual patterns, libido, or hormone levels.
For the treatment to be safe and effective, blood tests, follow-up visits, and the reporting of any unusual side effects are mandatory.
