Before taking lisinopril,
tell your doctor and pharmacist if you are allergic to lisinopril; other ACE inhibitors such as enalapril (Vasotec, in Vaseretic), benazepril (Lotensin, in Lotrel), captopril (Capoten), fosinopril (Monopril), moexipril (Univasc, in Uniretic), perindopril (Aceon), quinapril (Accupril, in Accuretic, in Quinaretic), ramipril (Altace), and trandolapril (Mavik, in Tarka); any other medications; or any ingredients in lisinopril tablets. Ask your pharmacist for a list of the ingredients.
tell your doctor or pharmacist if you are taking valsartan and sacubitril (Entresto) or if you have stopped taking it within the last 36 hours. Your doctor will probably tell you not to take lisinopril, if you are also taking valsartan and sacubitril. Also, tell your doctor if you have diabetes and you are taking aliskiren (Tekturna, in Amturnide, Tekamlo, Tekturna HCT). Your doctor will probably tell you not to take lisinopril if you have diabetes and you are also taking aliskiren.
tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking. Be sure to mention any of the following: aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs) such as indomethacin (Indocin, Tivorbex); diuretics ('water pills'); lithium (Lithobid); and potassium supplements. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
tell your doctor if you have or have ever had heart or kidney disease; diabetes; lupus; scleroderma (a condition in which extra tissue grows on the skin and some organs); or angioedema (a condition that causes difficulty swallowing or breathing and painful swelling of the face, throat, tongue, lips, eyes, hands, feet, ankles, or lower legs).
tell your doctor if you are breastfeeding.
if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking lisinopril.
you should know that diarrhea, vomiting, not drinking enough fluids, and sweating a lot can cause a drop in blood pressure, which may cause lightheadedness and fainting.