SUMMARY OBJECTIVE To describe clinical and epidemiological profiles of patients with hypertension referred to a secondary care unit and to assess the adequacy of the referral criteria. METHOD This descriptive transversal study analysed 943 hypertensive patients referred to a secondary healthcare unit from September 2010 to August 2012. Clinical and sociodemographic data as well as data regarding the liaison between secondary and primary care services were collected. RESULTS Patients’ mean age was 59±13.1 years, and 61.3% were female. Sedentary lifestyle, alcohol consumption, and smoking were observed in 80.3%, 31.1%, and 18.1% of the patients, respectively. Uncontrolled blood pressure was observed in 72.5% of the sample, and 80.1% of individuals were overweight or obese. There was a high prevalence of dyslipidaemia (73.1%), cardiovascular disease (97.5%), and reduced glomerular filtration rate (49.9%). Thirty-eight percent of patients did not meet the referral criteria, of whom approximately 25% were not hypertensive. CONCLUSION Even in a universal-access healthcare system, poor control of hypertension and high prevalence of obesity and cardiovascular diseases were observed. Inadequate referrals and the presence of clinical complications suggest low efficiency of the assistance provided in primary care and reinforce the need for sharing care with the secondary level.