Doxazosin Mesylate 4mg
Generic For: Cardura
Doxazosin mesylate (brand name Cardura) is an alpha-1 adrenergic blocker used to treat high blood pressure and the urinary symptoms of benign prostatic hyperplasia (BPH). It works by relaxing blood vessels and smooth muscle in the prostate and bladder neck. After a licensed provider reviews your prescription, your order ships from a licensed U.S. pharmacy.
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Buy Doxazosin Mesylate 4mg Online
An alpha-1 blocker for high blood pressure and enlarged prostate (BPH) symptoms
Doxazosin Mesylate 4mg Quick Facts
| Drug class | Alpha-1 adrenergic blocker |
|---|---|
| Treats | High blood pressure, enlarged prostate (BPH) symptoms |
| Form | Tablet |
| Typical dosing | Take 1 tablet by mouth daily. |
| Prescription required | Yes — prescription only |
What Is Doxazosin Mesylate 4mg?
Doxazosin mesylate is a prescription alpha-1 blocker sold under the brand name Cardura. It relaxes the muscles in blood vessel walls, which helps lower blood pressure. It also relaxes smooth muscle in the prostate and bladder neck, improving urine flow in men with benign prostatic hyperplasia (BPH). Doxazosin is taken as a once-daily oral tablet and is available in several strengths, including 4mg.
What Does Doxazosin Mesylate 4mg Treat?
High blood pressure (hypertension)
Benign prostatic hyperplasia (BPH) urinary symptoms
Difficulty urinating due to enlarged prostate
Weak urine stream and incomplete bladder emptying
Frequent or urgent urination associated with BPH
Doxazosin Mesylate 4mg Dosage
Hypertension: Start 1 mg by mouth once daily; titrate as directed up to 16 mg once daily.
BPH: Start 1 mg by mouth once daily; titrate at 1-2 week intervals up to 8 mg once daily.
Take at the same time each day; do not start at 4 mg without titration.
Your prescriber will determine the dose and duration that are right for you. Always follow the directions on your prescription label.
Doxazosin Mesylate 4mg Side Effects
Common side effects
- Dizziness
- Fatigue
- Headache
- Low blood pressure when standing (orthostatic hypotension)
- Drowsiness
- Swelling in the hands or feet (edema)
- Nausea
- Runny or stuffy nose
Serious side effects
Stop taking this medication and seek medical attention right away if you experience:
- Fainting (syncope), especially after the first dose
- Severe dizziness or lightheadedness on standing
- Fast or irregular heartbeat (palpitations)
- Priapism (painful, prolonged erection)
- Chest pain
- Signs of allergic reaction (rash, swelling, trouble breathing)
Warnings & Interactions
Do not use if allergic to doxazosin, other quinazolines (e.g., prazosin, terazosin), or any component of the tablet
May cause marked low blood pressure and fainting, especially with the first dose or dose increases
Use caution when driving or operating machinery until you know how it affects you
Can cause intraoperative floppy iris syndrome; tell your eye surgeon before cataract surgery
Use caution with other blood pressure medicines or PDE-5 inhibitors (e.g., sildenafil) due to additive hypotension
Strong CYP3A4 inhibitors may increase doxazosin levels; use with caution
Rule out prostate cancer before treating BPH symptoms
Tell your prescriber about all medications, supplements, and health conditions before starting doxazosin mesylate 4mg.
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