Prazosin belongs to the group of medications called antihypertensives, and specifically to the class of antihypertensives called alpha-receptor blockers. It is used to treat high blood pressure. It relaxes blood vessels, allowing blood to flow through them more easily. Prazosin may be used alone or in addition to other medications for the treatment of high blood pressure.
Your doctor may have suggested this medication for conditions other than those listed here. As well, some forms of this medication may not be used for all of the conditions discussed here. If you are not sure why you are taking this medication, speak to your doctor. Do not stop taking this medication without consulting your doctor.
Do not give this medication to anyone else, even if they have the same symptoms as you do. It can be harmful for people to take this medication if their doctor has not prescribed it.
Minipress® XL by Pfizer is no longer being manufactured for sale in the USA.
The recommended adult dose of prazosin starts with 1 mg taken 2 or 3 times daily and is increased gradually until the desired effect is achieved. The maximum dose is 20 mg daily taken in divided doses.
Store this medication at room temperature, protect it from light and moisture, and keep it out of the reach of children.
Many things can affect the dose of medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor.
It is important to take this medication exactly as prescribed by your doctor. If you miss a dose, take it as soon as possible and continue with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you are not sure what to do after missing a dose, contact your doctor or pharmacist for advice.
Prazosin should not be used by anyone who is allergic to prazosin, any of the class of similar medications (e.g., doxazosin, terazosin), or to any ingredients of the medication.
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