HOW TO USE: Take this medication by mouth, usually once or twice daily or as directed by your doctor. The dosage is based on your medical condition and response to therapy. For the treatment of high blood pressure, the manufacturer recommends taking no more than 16 milligrams per 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 a very slow heartbeat. Tell your doctor immediately if these effects occur.Take this medication regularly in order to get the most benefit from it. Remember to take it at the same time(s) each day. Do not skip doses or stop taking this medication unless directed by your doctor. It is important to continue taking this medication even if you feel well. Most people with high blood pressure do not feel sick. It may take up to several weeks before the full benefit of this drug takes effect.Inform your doctor if your condition worsens (e.g., your routine blood pressure readings increase).

SIDE EFFECTS: Dizziness, lightheadedness, headache, tiredness, or dry cough may occur as your body adjusts to the medication. You may also experience decreased sexual ability. 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: muscle cramps, weakness, fast/slow/irregular heartbeat, fainting, signs of infection (e.g., fever, chills, persistent sore throat), numbness/tingling/swelling of the hands/feet, chest pain.This drug may rarely cause serious (possibly fatal) liver problems. Seek immediate medical attention if you notice any of the following rare but very serious side effects: yellowing eyes/skin, dark urine, severe stomach/abdominal pain, persistent tiredness, persistent nausea/vomiting.Seek immediate medical attention if this rare but very serious side effect occurs: unusual change in the amount of urine.A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs. Symptoms of a serious allergic reaction may 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.

Report Problems to the Food and Drug Administration You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088. Need help identifying pills and medications? Use the pill identifier tool on RxList.