This drug can cause serious (possibly fatal) harm to an unborn baby if used during pregnancy. Therefore, it is important to prevent pregnancy while taking this medication. Consult your doctor for more details and to discuss the use of reliable forms of birth control while taking this medication. If you are planning pregnancy, become pregnant, or think you may be pregnant, contact your doctor immediately.

This drug belongs to a group of medications called ACE inhibitors. It is used to treat high blood pressure (hypertension). It works by relaxing blood vessels, causing them to widen. Lowering high blood pressure helps prevent strokes, heart attacks and kidney problems.

This medication is also used to improve survival after an acute heart attack, help protect the kidneys from damage due to diabetes, and with other drugs (e.g., "water pills"/diuretics, digoxin) to treat congestive heart failure.

Take this medication by mouth, usually two to three times a day; or as directed by your doctor. Take this drug on an empty stomach, one hour before a meal. Use this medication regularly in order to get the most benefit from it. Remember to use it at the same time(s) each day.

Do not take potassium supplements or salt substitutes containing potassium without talking to your doctor or pharmacist first. This medicine can raise your potassium levels, which rarely can cause serious side effects such as muscle weakness or very slow heartbeats. Tell your doctor immediately if these effects occur.

The dosage is based on your medical condition and response to therapy. For the treatment of high blood pressure, it may take 2 to 4 weeks before the full benefit of this drug occurs or several weeks to months when used for congestive heart failure.

It is important to continue taking this medication even if you feel well. Most people with high blood pressure do not feel sick.

You may experience dizziness, light-headedness, loss of taste, dry cough or blurred vision as your body adjusts to the medication. If any of these effects persist or worsen, notify your doctor or pharmacist promptly.

Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor immediately if any of these unlikely but serious side effects occur: fainting, decreased sexual ability, fast/pounding heartbeat.

Tell your doctor immediately if any of these highly unlikely but very serious side effects occur: change in the amount of urine, signs of infection (e.g., fever, chills, persistent sore throat).

This drug may rarely cause serious (possibly fatal) liver problems. If you notice any of the following highly unlikely but very serious side effects, seek immediate medical attention: yellowing eyes or skin, dark urine, stomach/abdominal pain, persistent fatigue, persistent nausea.

A serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction include: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Before taking captopril, tell your doctor or pharmacist if you are allergic to it; or to other ACE inhibitors (e.g., benazepril, lisinopril); or if you have any other allergies (including an allergic reaction after exposure to certain membranes used for blood filtering).

This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: history of an allergic reaction which included swelling of the face/lips/tongue/throat (angioedema).

Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney disease, liver disease, high blood levels of potassium, severe dehydration (and loss of electrolytes such as sodium), blood vessel disease (e.g., collagen vascular diseases such as lupus, scleroderma).

This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.

To minimize dizziness and light-headedness due to lowering of your blood pressure, get up slowly when rising from a seated or lying position. Serious loss of body fluids can also lower your blood pressure and worsen dizziness. Drink adequate fluids to prevent from becoming dehydrated. If you are on restricted fluid intake, consult your doctor for further instructions. Be careful not to become too overheated during exercise which can lead to excessive sweating. Consult your doctor if you experience severe vomiting or diarrhea.

This medication may make you more sensitive to the sun. Avoid prolonged sun exposure, tanning booths or sunlamps. Use a sunscreen and wear protective clothing when outdoors.

Before having surgery, tell your doctor or dentist that you are taking this medication.

Caution is advised when using this drug in the elderly because they may be more sensitive to its effects, especially dizziness.

Caution is advised when using this drug in children because they may be more sensitive to certain effects (e.g., excessive or prolonged decrease in blood pressure, change in the amount of urine, seizures).

This medication is not recommended for use during pregnancy due to the risk for harm to an unborn baby. Consult your doctor for more details. (See also Warning section.)

This medication passes into breast milk. While there have been no reports of harm to nursing infants, consult your doctor before breast-feeding.

Your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with them first.

Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription products you may use, especially of: drugs that suppress the immune system (e.g., azathioprine), lithium, non-steroidal anti-inflammatory drugs (NSAIDs such as celecoxib, ibuprofen, indomethacin), potassium-sparing "water pills" (diuretics such as amiloride, spironolactone, triamterene), potassium supplements (e.g., potassium chloride) or salt substitutes, trimethoprim-containing medications (e.g., sulfamethoxazole/trimethoprim), gold injections.

A very serious reaction may occur if you are getting injections for bee/wasp sting allergy (desensitization) and are also taking captopril. Make sure all your doctors know which medicines you are using.

Check the labels on all your medicines (e.g., cough-and-cold products, diet aids) because they may contain ingredients that could increase your heart rate or blood pressure. Ask your pharmacist about the safe use of those products.

This product can affect the results of certain lab tests. Make sure laboratory personnel and your doctors know you use this drug.

This document does not contain all possible interactions. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share the list with your doctor and pharmacist.

If overdose is suspected, contact your local poison control center or emergency room immediately. US residents can call the US national poison hotline at 1-800-222-1222. Canadian residents should call their local poison control center directly. Symptoms of overdose may include: unusually fast or slow heartbeat, severe dizziness, or fainting.

Do not share this medication with others. Lifestyle changes such as stress reduction programs, exercise and dietary changes may increase the effectiveness of this medicine. Talk to your doctor or pharmacist about lifestyle changes that might benefit you.

Laboratory and/or medical tests (e.g., kidney function, potassium blood level) should be performed periodically to monitor your progress or check for side effects. Consult your doctor for more details.

Check your blood pressure regularly while taking this medication, especially when you first start this drug or when your dose is changed. Learn how to monitor your own blood pressure at home, and share the results with your doctor.

If you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.

Store at room temperature between 59-86 degrees F (15-30 degrees C) away from light and moisture. It is normal for the drug to have a slight sulfur-like odor. Do not store in the bathroom. Keep all medicines away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company for more details about how to safely discard your product.

MEDICAL ALERT: Your condition can cause complications in a medical emergency. For enrollment information call MedicAlert at 1-800-854-1166 (USA) or 1-800-668-1507 (Canada).

Information last revised July 2009 Copyright(c) 2009 First DataBank, Inc.