Description
Cardura 4mg Tablets contain Doxazosin Mesylate, an alpha-1 adrenergic blocker used for the treatment of high blood pressure (hypertension) and benign prostatic hyperplasia (BPH), a condition in which the prostate gland enlarges causing urinary problems.
Cardura works by relaxing blood vessels and smooth muscles in the bladder neck and prostate, improving blood flow and urine flow while reducing blood pressure. Regular use helps lower the risk of heart attack, stroke, and kidney problems in hypertensive patients.
Ingredients
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Active Ingredient: Doxazosin Mesylate 4mg
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Inactive Ingredients: Microcrystalline cellulose, lactose monohydrate, magnesium stearate, sodium starch glycolate, and other excipients.
Drug Class
Dosage Form
Uses
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Treatment of high blood pressure (hypertension)
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Management of benign prostatic hyperplasia (BPH)
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Helps improve urine flow and reduce symptoms of prostate enlargement
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May be used as part of combination therapy for hypertension
Dosage
In Case of Overdose
Symptoms: Severe dizziness, fainting, or extreme drop in blood pressure.
Action: Seek immediate medical attention or go to the nearest emergency facility.
Missed Dose
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Take it as soon as you remember.
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Skip the missed dose if it’s almost time for your next scheduled dose.
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Do not double the dose to make up for a missed one.
How To Use
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Take the tablet by mouth, with or without food.
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Take at the same time each day, preferably at bedtime to reduce dizziness.
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Swallow whole with a full glass of water.
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Continue taking even if you feel well; high blood pressure often has no symptoms.
When Not to Use
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Hypersensitivity to Doxazosin or other quinazoline derivatives (e.g., prazosin, terazosin)
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Severe liver impairment
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History of orthostatic hypotension (drop in blood pressure when standing)
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Pregnancy or breastfeeding without doctor’s advice
Side Effects
Common:
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Dizziness or lightheadedness
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Fatigue or drowsiness
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Headache
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Swelling of feet or ankles (edema)
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Low blood pressure (especially after the first dose)
Less Common:
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Nausea
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Palpitations
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Nasal congestion
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Weight gain
Serious (seek medical help):
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Chest pain or irregular heartbeat
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Fainting
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Persistent erection (priapism)
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Swelling of face, lips, or throat (allergic reaction)
Precautions & Warnings
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Take your first dose at bedtime to prevent dizziness or fainting.
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Use caution when driving or operating machinery until you know how it affects you.
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Avoid sudden position changes (from sitting or lying to standing).
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Inform your doctor if you have liver disease, heart conditions, or kidney problems.
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May cause low blood pressure when used with other antihypertensive drugs.
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Inform your doctor before any eye surgery (cataract) as it can cause intraoperative floppy iris syndrome (IFIS).
Drug Interactions
May interact with:
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Other blood pressure medicines (e.g., beta-blockers, ACE inhibitors)
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Phosphodiesterase inhibitors (e.g., sildenafil, tadalafil) – can cause a dangerous drop in blood pressure
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NSAIDs – may reduce its blood pressure–lowering effect
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Cimetidine – may increase Doxazosin levels in blood
Storage/Disposal
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Store below 25°C, in a cool, dry place away from sunlight and moisture.
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Keep out of reach of children.
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Do not use after the expiry date.
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Dispose of unused medicine safely; do not flush down the toilet.
Control Drug
Quick Tips
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Take your first dose at bedtime to reduce dizziness and fainting.
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Rise slowly from sitting or lying positions to prevent a sudden drop in blood pressure.
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Continue taking even if you feel well—stopping suddenly may worsen your condition.
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Avoid alcohol as it can intensify dizziness.
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Inform your doctor if you plan eye surgery or are taking ED medications.
