Prazosin and Polythiazide (Systemic)

Brand Names : Minizide

Side Effects of This Medicine

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor as soon as possible if any of the following side effects occur, especially since some of them may mean that your body is losing too much potassium:

Signs and symptoms of too much potassium loss

Dryness of mouth (severe); increased thirst; irregular heartbeat (continuing); mood or mental changes; muscle cramps or pain; nausea or vomiting; unusual tiredness or weakness; weak pulse

Signs and symptoms of too much sodium loss

Confusion; convulsions; decreased mental activity; irritability; muscle cramps; unusual tiredness or weakness

More common

Dizziness or lightheadedness, especially when getting up from a lying or sitting position; sudden fainting

Less common

Inability to control urination; irregular heartbeat; pounding heartbeat; swelling of feet or lower legs; weight gain

Rare

Black, tarry stools; blood in urine or stools; chest pain; cough or hoarseness; fever or chills; joint pain; lower back or side pain; painful or difficult urination; painful, inappropriate erection of penis, continuing; pinpoint red spots on skin; shortness of breath; skin rash or hives; stomach pain (severe) with nausea and vomiting; unusual bleeding or bruising; yellow eyes or skin

Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your doctor if any of the following side effects continue or are bothersome:

Less common

Decreased sexual ability; diarrhea; drowsiness; headache; increased sensitivity of skin to sunlight; lack of energy; loss of appetite; nervousness; stomach upset or pain

Rare

Frequent urge to urinate; nausea

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.