Before taking fosinopril,
tell your doctor and pharmacist if you are allergic to fosinopril; other ACE inhibitors such as benazepril (Lotensin, in Lotrel), captopril (Capoten), enalapril (Vasotec, in Vaseretic), lisinopril (in Prinzide, in Zestoretic), moexipril (Univasc, in Uniretic), perindopril (Aceon), quinapril (Accupril, in Accuretic, in Quinaretic), ramipril (Altace), and trandolapril (Mavik); any other medications; or any ingredients in fosinopril 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 fosinopril, 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 fosinopril 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: 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.
if you are taking antacids (Maalox, Mylanta), take them 2 hours before or after fosinopril.
tell your doctor if you are on dialysis and if you have or have ever had lupus; scleroderma (a condition in which extra tissue grows on the skin and some organs); heart failure; high blood pressure; diabetes; or liver or kidney disease.
tell your doctor if you are breast-feeding.
if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking fosinopril.
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.