Abstract:
OBJECTIVES:An unblinded, multicenter study to evaluate the efficacy and safety of a long-acting depot formulation of leuprolide (30 mg injected intramuscularly every 16 weeks) was carried out in 49 patients with Stage D2 prostate cancer. METHODS:Clinical evaluations were performed every 16 weeks, and serum testosterone levels were monitored biweekly or weekly for 32 weeks. RESULTS:The mean serum testosterone level for the 45 evaluable patients fell to the castrate range (50 ng/dL or less) by week 3 after the initial depot injection and remained at that level throughout the initial 32-week treatment period. The median time to the onset of castrate levels was 22 days (range 9 to 43). Onset of castrate levels of testosterone was achieved within 4 weeks of the initial depot injection in 96% of patients. One patient (2%) experienced a transient "escape" (testosterone levels greater than 50 ng/dL on two consecutive determinations). Delay of an injection by up to 3 weeks did not have an effect on testosterone suppression. Objective tumor response (no progression) occurred in 90% of patients at week 16 and in 80% at week 32. Prostate-specific antigen and prostatic acid phosphatase decreased by 50% or more at week 32 in 97% and 76% of patients, respectively. Assessment of local disease status and overall performance status showed improvement or stability in most patients. The most common adverse events were hot flashes (45%), back pain (16%), and arthralgia (14%). CONCLUSIONS:The 30-mg depot formulation of leuprolide, which acts in a manner similar to the 7.5- and 22.5-mg depot formulations (given monthly and every 3 months, respectively) is effective in lowering serum testosterone to castrate levels in all patients and demonstrates a favorable response in 80% of the patients with advanced prostate cancer for the 32-week observation period. The drug was well tolerated in all patients.
journal_name
Urologyjournal_title
Urologyauthors
Sharifi R,Knoll LD,Smith J,Kramolowsky Edoi
10.1016/s0090-4295(97)00500-1subject
Has Abstractpub_date
1998-02-01 00:00:00pages
271-6issue
2eissn
0090-4295issn
1527-9995pii
S0090-4295(97)00500-1journal_volume
51pub_type
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