doxazosin mesylate, Cardura, Cardura XL (cont.)
Omudhome Ogbru, PharmD
Omudhome Ogbru, PharmD
Dr. Ogbru received his Doctorate in Pharmacy from the University of the Pacific School of Pharmacy in 1995. He completed a Pharmacy Practice Residency at the University of Arizona/University Medical Center in 1996. He was a Professor of Pharmacy Practice and a Regional Clerkship Coordinator for the University of the Pacific School of Pharmacy from 1996-99.
Medical and Pharmacy Editor:
PRESCRIBED FOR: Doxazosin is used for the treatment of hypertension (high blood pressure) and benign prostatic hyperplasia (BPH).
SIDE EFFECTS: Common reactions include:
Doxazosin causes significant reduction in blood pressure after administration of the first dose (first dose effect). This reduction in blood pressure may be associated with dizziness and fainting, especially when rising from a sitting position. To avoid this, patients should rise slowly from a sitting position, start treatment with the 1 mg dose, and then doses should be adjusted upwards slowly. Priapism (painful, prolonged penile erection) and a reduction in white blood cells have been associated with doxazosin.
Doxazosin can cause intraoperative floppy iris syndrome (IFIS) during cataract surgery. Patients should inform their eye surgeon that they are taking doxazosin.
STORAGE: Doxazosin should be stored at room temperature, 15 C - 30 C (59 F - 86 F).
GENERIC AVAILABLE: Yes
PREPARATIONS: Tablets: 1, 2, 4, and 8 mg. Tablets (Extended Release): 4, 8 mg
DOSING: The recommended dose of doxazosin for hypertension is 1-16 mg daily. The recommended dose for benign prostatic hyperplasia is 1-8 mg daily.
DRUG INTERACTIONS: Vardenafil (Levitra) or tadalafil (Cialis) and doxazosin have additive blood pressure lowering effects. Combining vardenafil or tadalafil (Cialis) with doxazosin may cause excessive blood pressure reduction.
Medically Reviewed by a Doctor on 1/29/2015
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
Need help identifying pills and medications?
Back to Medications Index
- Allergic Skin Disorders
- Bacterial Skin Diseases
- Bites and Infestations
- Diseases of Pigment
- Fungal Skin Diseases
- Medical Anatomy and Illustrations
- Noncancerous, Precancerous & Cancerous Tumors
- Oral Health Conditions
- Papules, Scales, Plaques and Eruptions
- Scalp, Hair and Nails
- Sexually Transmitted Diseases (STDs)
- Vascular, Lymphatic and Systemic Conditions
- Viral Skin Diseases
- Additional Skin Conditions