Studies were identified on internet by searching on address: http://www.ncbi.nlm.nih.gov/pubmed/ with criteria that studies should be placebo-controlled and randomized in trials of alpha-blockers in chronic category III prostatitis evaluated by symptom-score NIH-CPSI. From 13 clinical studies three were excluded because of not using NIH-CPSI, three were in Chinese language and two were congress abstracts. Analysed were five studies with four or five Jadad scale including 563 patients. Alpha-blockers alfuzosin, terazosin, tamsulosin and doxazosin have been used through 6 weeks and 6 months. Better results were accomplished by less selective alpha-blockers alfuzosin, terazosin and doxazosin through 3-6 months in patients having higher NIH-CPSI score and higher voiding score.