Doxazosin Mesylate 8mg
Generic For: Cardura
Doxazosin mesylate (Cardura) is an alpha-1 adrenergic blocker prescribed to treat high blood pressure and the urinary symptoms of an enlarged prostate (benign prostatic hyperplasia). It works by relaxing blood vessels and the muscles of 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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Doxazosin mesylate is an alpha-blocker used to treat high blood pressure and benign prostatic hyperplasia (BPH)
Doxazosin Mesylate 8mg Quick Facts
| Drug class | Alpha-1 adrenergic blocker |
|---|---|
| Treats | High blood pressure, enlarged prostate (BPH) |
| Form | Tablet |
| Typical dosing | Take 1 tablet by mouth daily. |
| Prescription required | Yes — prescription only |
What Is Doxazosin Mesylate 8mg?
Doxazosin mesylate is the generic form of Cardura, an alpha-1 adrenergic blocker taken as a once-daily tablet. It relaxes the smooth muscle in blood vessel walls, which lowers blood pressure, and relaxes muscle in the prostate and bladder neck, which eases urinary symptoms of an enlarged prostate. Doctors prescribe it for hypertension and for benign prostatic hyperplasia (BPH), either alone or with other medications. The 8mg tablet is the highest standard strength and is typically reached by gradual dose increases under a provider's supervision.
What Does Doxazosin Mesylate 8mg Treat?
High blood pressure (hypertension)
Benign prostatic hyperplasia (BPH)
Urinary symptoms of an enlarged prostate (weak stream, urgency, frequency)
Hypertension in combination with other blood pressure medications
Long-term management of BPH symptoms
Doxazosin Mesylate 8mg Dosage
Hypertension: Start 1mg by mouth once daily; titrate as directed to a maximum of 16mg once daily.
BPH: Start 1mg by mouth once daily; titrate at 1-2 week intervals as directed to a maximum of 8mg once daily.
Take at the same time each day; do not start at 8mg.
Your prescriber will determine the dose and duration that are right for you. Always follow the directions on your prescription label.
Doxazosin Mesylate 8mg Side Effects
Common side effects
- Dizziness
- Fatigue or drowsiness
- Headache
- Low blood pressure when standing (orthostatic hypotension)
- Swelling of the hands or feet (edema)
- Runny or stuffy nose
- Nausea
Serious side effects
Stop taking this medication and seek medical attention right away if you experience:
- Fainting (syncope), especially after the first dose or a dose increase
- Fast or irregular heartbeat (palpitations)
- Severe dizziness or lightheadedness on standing
- Painful, prolonged erection (priapism) — seek emergency care
- Allergic reaction (rash, swelling, difficulty breathing)
- Worsening chest pain (angina)
Warnings & Interactions
Do not use if allergic to doxazosin, other quinazolines (prazosin, terazosin), or any ingredient in the tablet
May cause marked low blood pressure and fainting, especially with the first dose or dose increases — avoid driving until you know how it affects you
Use caution with PDE5 inhibitors (sildenafil, tadalafil) or other blood pressure medicines — additive blood pressure lowering
Strong CYP3A4 inhibitors (e.g., ketoconazole, clarithromycin) may increase doxazosin levels
Tell your eye surgeon before cataract surgery — risk of intraoperative floppy iris syndrome
Rule out prostate cancer before treating BPH symptoms
Use caution in patients with severe liver impairment
Tell your prescriber about all medications, supplements, and health conditions before starting doxazosin mesylate 8mg.
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