Frictional work in double-sided tablet compression

OBJECTIVE: To critique the US Department of Health and Human Services Public Health Service, Agency for Health Care Policy and Research, Clinical Practice Guideline on Benign Prostatic Hyperplasia: Diagnosis and Treatment; and to provide an update on management and treatment of benign prostatic hyperplasia (BPH) since the Guideline was published. DATA SOURCES: A review of the published medical literature in MEDLINE from 1994 to April 1996, limited in focus to drug treatment of BPH, English language, and human subjects, was performed. STUDY SELECTION: Controlled clinical studies of drug treatment for symptomatic BPH that used objective parameters (e.g., urinary flow rate, prostatic volume, voiding symptom scores) were evaluated. A single reviewer assessed each study. DATA EXTRACTION: Study methods, inclusion and exclusion criteria, and treatment outcomes were assessed for all studies. Independent extraction was performed by a single observer. DATA SYNTHESIS: Management of BPH is directed at ameliorating voiding symptoms. For moderate or severe BPH, medical or surgical therapy should be offered to the majority of patients. Medical therapy options include alpha-adrenergic antagonists and finasteride. The former offer the advantage of a more prompt onset of action (within weeks) when compared with finasteride. Finasteride produces a lower response rate and smaller improvement in voiding symptoms. Combination therapy of terazosin and finasteride has not been proven to be more effective than terazosin monotherapy. CONCLUSIONS: When medical therapy is indicated for moderate or severe BPH, alpha-adrenergic antagonists exhibit a faster onset of action and produce greater improvement of voiding symptoms than does finasteride.