OBJECTIVES To compare the use profile of statins in patients with clinical diagnosis of heterozygous family hypercholesterolaemia (HFH) and the use profile of the general population treated with statins. DESIGN. Retrospective, observational study. SETTING Galician Health Service, Spain. PARTICIPANTS Patients under 65 years old treated with statins. MAIN MEASUREMENTS In patients with HFH: number of patients, age, gender, statins used and defined daily dose per patient and day (DDD/patient/day). Variables in the rest of the population treated with statins: number of patients, statins used and DDD/patient/day. RESULTS In a sample of 331 under-65 patients with HFH, 185 were men (55.86%) and 146 women (44.14%). Their average age was 44.56 years old (95% CI, 43.33-45.80), without statistically significant differences between men and women. Relevant differences in the daily mean consumption (DDD/patient/day) of statins between the studied sample and the rest of the under-65 population treated with statins were found (3.03 DDD/patient/day [95% CI, 2.70-3.36] vs 1.33 DDD/patient/day [95% CI, 1.16-1.40]; P< .001). These differences were caused by atorvastatin: 70% of HFH patients were being treated with atorvastatin (versus 37.6% of the rest of the population treated with statins). Differences in daily mean consumption of atorvastatin between HFH and the rest of the statin-treated population were also found (3.58 DDD/patient/day [95% CI, 3.15-4.02] vs 1.64 DDD/patient/day [95% CI, 1.37-1.90]; P< .001). CONCLUSIONS The DDD/patient/day of statins in HFH patients is double that of the rest of the population treated with statins. The different pattern of use of atorvastatin in HFH is the main reason for these results.