To evaluate the efficacy of a terpene mixture (rowatinex) compared to ibuprofen, patients with chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS) were randomly selected to either receive rowatinex 200 mg t.i.d. or ibuprofen 600 mg t.i.d. After a 6-week treatment, the decrease in the mean total NIH-CPSI score was significant in both groups from 21.4 to 15.3, (6.1 (p < 0.01) and from 21.2 to 16.8, (4.4 (p = 0.04) in the rowatinex and ibuprofen group, respectively. The rate of definite improvement as defined as 25% improvement in the total score was superior (p = 0.04) in the rowatinex group (68%) versus the ibuprofen group (40%). Judging from these results, rowatinex gave significant symptomatic relief and may be of benefit for many men diagnosed with CP/CPPS. Further, including the placebo-controlled studies are necessary to define its role in the management of this difficult to treat disease.