The aim of this study was to retrospectively investigate the clinicopathological characteristics of cats with obstructive FLUTD in Aydin Province (Turkey) and the relationship of these features with short-(<36 hours) and long-term (≥36 hours) obstructions. A total of 27 adult cats of different breeds and ages with obstructive FLUTD were included in the study. Of these, 19 had short-term (Group 1), and 8 had long-term (Group 2) urethral obstruction history and clinical findings. Most of the cats with urethral obstruction were male, a mean age of 4.32±0.6 and cross-breed. Regarding the baseline characteristics, no obvious differences between the two groups. Besides localized symptoms such as dysuria, stranguria, oliguria/anuria, polysystemic findings such as dehydration, vomiting, and lethargy were statistically more frequent in the Group 2 cats compared to the Group 1. Pyuria, haematuria and proteinuria were the most common findings in the urinalysis. In cats with long-term obstruction (Group 2), azotemia and hyperkalemia were relatively severe and common. In conclusion, this study demonstrated that clinicopathological changes in cats with urethral obstruction are related to the duration of the obstruction. Considering the severity of both clinical findings and metabolic changes, emergency intervention in cats with urethral obstruction is of great importance.