Before taking this product, tell your doctor or pharmacist if you are allergic to lisinopril or hydrochlorothiazide; or to other ACE inhibitors (such as captopril, benazepril); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: history of an allergic reaction that included swelling of the face/lips/tongue/throat (angioedema), blood filtering procedures (such as LDL apheresis, dialysis), desensitizing treatment for bee/wasp sting allergy, gout, lupus, kidney disease, liver disease, skin cancer.

This drug may make you dizzy. Alcohol or marijuana (cannabis) can make you more dizzy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Limit alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis).

Severe sweating, diarrhea, or vomiting may cause dehydration and cause you to feel lightheaded. Tell your doctor if you have severe diarrhea or vomiting. To prevent dehydration, drink plenty of fluids unless your doctor tells you not to.

If you have diabetes, this product may affect your blood sugar. Check your blood sugar regularly as directed and share the results with your doctor. Your doctor may need to adjust your diabetes medication, exercise program, or diet.

This medication may make you more sensitive to the sun. It may also increase your risk for skin cancer, especially if you take it for a long time. Limit your time in the sun. Avoid tanning booths and sunlamps. Use sunscreen and wear protective clothing when outdoors. Tell your doctor right away if you get sunburned, have skin blisters/redness, or notice new or changed moles/skin lesions.

This product may affect your potassium levels. Before using potassium supplements or salt substitutes that contain potassium, consult your doctor or pharmacist.

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

Older adults may be more sensitive to the side effects of this drug, especially dizziness and change in the amount of urine (kidney problems).

Tell your doctor if you are pregnant or plan to become pregnant. You should not become pregnant while using this product. Lisinopril may harm an unborn baby. If you become pregnant, talk to your doctor right away about the risks and benefits of this medication. (See also Warning section.)

It is unknown if lisinopril passes into breast milk. Hydrochlorothiazide passes into breast milk, but is unlikely to harm a nursing infant. Consult your doctor before breastfeeding.