HOW TO USE: Take this medication by mouth with or without food, usually once daily or as directed by your doctor. If this medication causes you to urinate more frequently, then it is best to take this medication in the morning or during the day (at least 4 hours before your bedtime) to avoid having to get up during the night to urinate. Consult your doctor or pharmacist if you have questions about your dosing schedule.The dosage is based on your medical condition and response to treatment.Use this medication regularly in order to get the most benefit from it. To help you remember, take it at the same time each day. Also, keep your doses in a special pill box with 1 space marked for each day of the week. It is important to continue taking this medication even if you feel well. Most people with high blood pressure do not feel sick.For the treatment of high blood pressure, it may take 2 to 4 weeks before the full benefit of this drug occurs. It may take several weeks or months to see the full benefit when this drug is used for heart failure.Tell your doctor if your condition worsens (e.g., your routine blood pressure readings increase).

SIDE EFFECTS: Dizziness, lightheadedness, tiredness, or headache may occur as your body adjusts to the medication. Dry cough may also occur. If any of these effects persist or worsen, tell 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: extreme thirst, very dry mouth, muscle cramps/weakness, swelling of the hands/feet, fast/slow/irregular heartbeat, fainting, muscle/joint aches, tingling/numbness of the hands/feet.Tell your doctor immediately if any of these rare but very serious side effects occur: signs of infection (e.g., fever, chills, persistent sore throat), yellowing eyes/skin, dark urine, severe stomach/abdominal pain, persistent tiredness, persistent nausea/vomiting, easy bruising/bleeding, unusual change in the amount of urine (not including the normal increase in urine when you first start this drug), seizures.A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: 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.