If you are over 65 years of age, your healthcare provider may choose to monitor your dosing adjustments more cautiously. The recommended starting dosage of lisinopril for people with high blood pressure (hypertension) is 10 mg, taken once daily. Based on the blood pressure response and/or side effects of lisinopril, the dosage may be increased or decreased. For most people, the normal daily dose is 20 mg to 40 mg. For each change in your lisinopril dosage, it may take several weeks to see the full effects on blood pressure.