What should I avoid while taking lisinopril and hydrochlorothiazide?

Avoid becoming pregnant or breastfeeding while taking lisinopril-hydrochlorothiazide (HCTZ), because it can harm a developing fetus or nursing infant. Avoid using potassium supplements or potassium salt substitutes while taking lisinopril and hydrochlorothiazide, because this can lead to dangerously high blood potassium levels. Avoid drinking alcohol while taking lisinopril-HCTZ. Avoid driving or operating machinery or tools until you know how the drug will affect you, because it may cause drowsiness and dizziness.