Minipress Oral

Minipress Oral Warning

Prazosin can occasionally cause sudden fainting after the first dose. To reduce your risk of fainting, the first dose prescribed by your doctor will be the smallest dose available. You should take this first dose as you are going to bed. This will decrease the possibility of fainting. Your dose will then be gradually increased. Any other medicines for high blood pressure should be started with caution after you are on a stable dose of prazosin.

Minipress Oral Side Effects

Headache, drowsiness, tiredness, weakness, blurred vision, nausea, vomiting, constipation, or a feeling in your chest of a pounding/irregular heartbeat (palpitation) may occur as your body adjusts to the medication.

Lightheadedness or dizziness upon standing may also occur, especially after the first dose and shortly after taking a dose of the drug during the first week of treatment. To minimize dizziness and reduce the risk of fainting, get up slowly when rising from a seated or lying position. If dizziness occurs, sit or lie down immediately. If any of these effects persist or worsen, notify your doctor or pharmacist promptly. Your dose may need to be adjusted.

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:

• decreased sexual ability
• very fast/irregular heartbeat
• fainting
• frequent urination
• inability to control urination (incontinence)
• diarrhea
• mental/mood changes (e.g., depression, hallucinations)
• swelling of the feet/ankles
• shortness of breath
• hair loss
• ringing in the ears

For males, in the very unlikely event you have a painful, prolonged erection (lasting more than 4 hours), stop using this drug and seek immediate medical attention, or permanent problems could occur.

Tell your doctor immediately if any of these rare but very serious side effects occur: