Osteoarthritis is the most common form of arthritis worldwide and progression of arthritis may lead to secondary complications. Osteoarthritis is the degradation of joint tissues from the effects of injury, grinding sensation and inflammation. There are three main systems of medicine including allopathic, homeopathic and herbal system for the treatment of osteoarthritis. Plants are the basis for traditional medicine which is still widely practiced today. The objective of the present study is to find out the complaints and secondary complications in patients of osteoarthritis on allopathic, homeopathic and herbal system of medicine. This study was conducted in Karachi from January 2019 to January 2020. Allopathic, Homeopathic and Herbal practitioners were consulted in the study (n=600, with= 200 in each study group). Data was analyzed by SPSS 22 version. Finding of the study suggest that after the treatment with allopathic medicines orthopaedician, family physician or rheumatologist / internal medicine specialist, there was no significant difference in complaints (Chi-square =0.598, p=0.742). Moreover, there was no significant difference in complications (Chi-square = 0.039, p=0.981). While treatment with homeopathic medicines either by orthologist or family physician significant difference in complaints were observed (Chi-square =4.86, p=0.027). The patient visiting family physicians have higher number of complications than orthologists. While treatment with herbal medicines either by orthologists or family physician there was significant difference in complaints. (Chi-square =5.404, p=0.020). The study reveals that there is no significant difference of complaints and complications in allopathic systems of medicine when treating osteoarthritis, while it is significant for homeopathic and herbal medicine.