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Algeria has more than 1.7 million diabetic patients on to whom a descriptive assessment particularly on the insulin usage behaviors has not yet been initiated, although is needed. This study aims to provide a descriptive analysis of how Algerian diabetic patients perceive and apply insulin injection techniques. using the \"patient\" questionnaire within the Injection Technique Questionnaire (ITQ) 2016 survey, this study assessed the insulin injection practices of 100 patients recruited over a seven-month period in western Algeria at the Tlemcen University Hospital Center. The results of this study are compared to those of the ITQ 2016 survey. pens are the instruments of injection for 98% of Algerians who continue to use mostly long needles of 6- and 8-mm, although 4mm needles are the recommended safer option. Insulin analogues (fast and basal) are plebiscite. Arms and thighs are the preferred injection sites; the abdomen (the preferred site elsewhere) is neglected for reasons to be investigated. The correct re-suspension technique for cloudy insulin is unknown. Extensive pen needle re-use (10+ times) for over half of the patients exposes them to both higher intramuscular (IM) injection risk and lipohypertrophy (LH). Injection training is performed in Algeria by the diabetologist. this study describes for the first time Algerian patients´ insulin injection technique. It highlights their skills and identifies many deficiencies which patients and professionals must correct given the issues in this area.