"The U.S. Food and Drug Administration today expanded the approved use of Zytiga (abiraterone acetate) to treat men with late-stage (metastatic) castration-resistant prostate cancer prior to receiving chemotherapy.
The FDA initially appr"...
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In the majority of patients testosterone levels increased above baseline during the first week, declining thereafter to baseline levels or below by the end of the second week of treatment. This transient increase was occasionally associated with a temporary worsening of signs and symptoms, usually manifested by an increase in bone pain (see WARNINGS section). In a few cases a temporary worsening of existing hematuria and urinary tract obstruction occurred during the first week. Temporary weakness and paresthesia of the lower limbs have been reported in a few cases.
Potential exacerbations of signs and symptoms during the first few weeks of treatment is a concern in patients with vertebral metastases and/or urinary obstruction which, if aggravated, may lead to neurological problems or increase the obstruction.
In a comparative trial of LUPRON INJECTION (leuprolide acetate) versus DES, in 5% or more of the patients receiving either drug, the following adverse reactions were reported to have a possible or probable relationship to drug as ascribed by the treating physician. Often, causality is difficult to assess in patients with metastatic prostate cancer. Reactions considered not drug related are excluded.
|Number of Reports|
|Congestive heart failure||1||5|
|High blood pressure||8||5|
|*Decreased testicular size||7||11|
|*Gynecomastia/breast tenderness or pain||7||63|
|Hemic and Lymphatic System|
|Central/Peripheral Nervous System|
|Urinary tract infection||3||7|
|* Physiologic effect of decreased testosterone.|
In this same study, the following adverse reactions were reported in less than 5% of the patients on LUPRON (leuprolide acetate injection) .
Endocrine System— Libido decrease, Thyroid enlargement;
Musculoskeletal System— Joint pain;
Miscellaneous— Depression, Diabetes, Fatigue, Fever/chills, Hypoglycemia, Increased BUN, Increased calcium, Increased creatinine, Infection/inflammation, Ophthalmologic disorders, Swelling (temporal bone).
In an additional clinical trial and from long-term observation of both studies, the following additional adverse events (excluding those considered not drug related) were reported for patients receiving LUPRON (leuprolide acetate injection) .
Endocrine System— Libido increase, Thyroid nodule;
Musculoskeletal System— Ankylosing spondylosis, Arthritis, Blurred disc margins, Bone fracture, Muscle stiffness, Muscle tenderness, Pelvic fibrosis, Spasms/cramps;
Central/Peripheral Nervous System— Auditory hallucinations/tinnitus, Decreased hearing, Decreased reflexes, Euphoria, Hyperreflexia, Loss of smell, Motor deficiency;
Miscellaneous— Abdominal distention, Facial swelling/edema, Feet burning, Flu, Eyelid growth, Hypoproteinemia, Accidental injury, Knee effusion, Mass, Pallid, Sallow, Weakness.
During postmarketing surveillance which includes other dosage forms and other patient populations, the following adverse events were reported.
Localized reactions including induration and abscess have been reported at the site of injection.
Gastrointestinal System – Hepatic dysfunction;
Hemic and Lymphatic System – Decreased WBC;
Integumentary System – Hair growth;
Central/Peripheral Nervous System – Spinal fracture/paralysis, Hearing disorder;
Miscellaneous – Hard nodule in throat, Weight gain, Increased uric acid;
Musculoskeletal System – Tenosynovitis-like symptoms;
Respiratory System – Respiratory disorders.
Changes in Bone Density
Decreased bone density has been reported in the medical literature in men who have had orchiectomy or who have been treated with an LH-RH agonist analog. In a clinical trial, 25 men with prostate cancer, 12 of whom had been treated previously with leuprolide acetate for at least six months, underwent bone density studies as a result of pain. The leuprolide-treated group had lower bone density scores than the nontreated control group. It can be anticipated that long periods of medical castration in men will have effects on bone density.
During post-marketing surveillance, rare cases of pituitary apoplexy (a clinical syndrome secondary to infarction of the pituitary gland) have been reported after the administration of gonadotropin-releasing hormone agonists. In a majority of these cases, a pituitary adenoma was diagnosed, with a majority of pituitary apoplexy cases occurring within 2 weeks of the first dose, and some within the first hour. In these cases, pituitary apoplexy has presented as sudden headache, vomiting, visual changes, ophthalmoplegia, altered mental status, and sometimes cardiovascular collapse. Immediate medical attention has been required.
See other LUPRON (leuprolide acetate injection) DEPOT and LUPRON (leuprolide acetate injection) INJECTION package inserts for other events reported in the same and different patient populations.
Read the Lupron (leuprolide acetate injection) Side Effects Center for a complete guide to possible side effects
See CLINICAL PHARMACOLOGY, Pharmacokinetics section.
Drug/Laboratory Test Interactions
Administration of leuprolide acetate in therapeutic doses results in suppression of the pituitary-gonadal system. Normal function is usually restored within 4 to 12 weeks after treatment is discontinued.
Last reviewed on RxList: 3/3/2011
This monograph has been modified to include the generic and brand name in many instances.
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