Aim To determine the prevalence of complementary medicines use by Australian war veterans. Method The presence and use of complementary medicines and conventional medicines were recorded during home visits of 1082 veterans and war widow(er)s in five Australian states. Results 405 (37%) veterans had complementary medicines. Vitamins and minerals were most common (88%), followed by supplements (21%) and herbals (18%). GPs had documented complementary medicines use for 59% of the 405 veterans. 31% of the veterans were at risk of potential interactions. Conclusion Complementary medicines are growing in popularity and pharmacists should be responsible for understanding their risks and benefits, and provide education to enhance the quality use of all medicines.