Cardura XL 4mg Tablet
Rx- FDA Approved
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Prescription Required
Overview
Cardura XL 4mg Tablet contains doxazosin 4mg (extended-release (GITS) tablet), an alpha-1 adrenergic receptor blocker used to treat high blood pressure (hypertension) and to relieve the urinary symptoms of benign prostatic hyperplasia (BPH), such as difficulty urinating, weak urine stream, and frequent urination, in men.
Doxazosin works by blocking alpha-1 receptors found in the walls of blood vessels and in the smooth muscle of the prostate and bladder neck. Blocking these receptors relaxes blood vessels, which lowers blood pressure, and relaxes the prostate and bladder neck muscle, which improves urine flow in men with BPH.
How it Works
Doxazosin selectively and competitively blocks postsynaptic alpha-1 adrenoceptors, preventing noradrenaline from causing smooth muscle contraction. In blood vessels this produces vasodilation and lowers peripheral resistance and blood pressure; in the prostate and bladder neck it relaxes smooth muscle tone, reducing resistance to urine flow.
Directions for Use
Swallow Cardura XL 4mg Tablet whole with a glass of water – do not crush, split, or chew it, as this is a controlled-release (GITS) tablet designed to release doxazosin gradually over 24 hours. You may notice something resembling the tablet shell in your stool – this is expected, as the outer shell of this delivery system is not absorbed and is passed out once the medicine has been released.
Dosage
Cardura XL 4mg Tablet dosing is individualised by your doctor and typically started at a low dose, increased gradually if needed based on your blood pressure or urinary symptom response. The exact starting and maintenance dose depends on which condition is being treated and how you respond, so always follow your doctor’s specific instructions.
Shelf Life
Use this product before the expiry date stated on the packaging. Do not use the medicine if the expiry date has passed.
Storage Instructions
Store below 30°C in a dry place, away from direct sunlight and out of reach of children.
Side Effects
- Dizziness or light-headedness
- Headache
- Fatigue or tiredness
- Swelling in the legs or feet (edema)
- Runny or stuffy nose
- Low blood pressure, especially when standing up quickly
Contraindications
- Known hypersensitivity to doxazosin, other quinazolines, or any ingredient in this product
- History of postural (orthostatic) hypotension
- Existing bladder outlet obstruction of a degree requiring surgery, in some clinical situations
Drug / Food Interactions
- Other blood-pressure-lowering medicines increase the risk of low blood pressure and dizziness when combined
- PDE5 inhibitors (e.g. sildenafil, tadalafil) can cause an additive drop in blood pressure when combined with doxazosin
- Alcohol can worsen dizziness and low blood pressure while taking this medicine
Quick Tips
- Rise slowly from sitting or lying down, especially after the first few doses, to reduce the risk of dizziness or fainting
- Take your first dose at bedtime if advised by your doctor, as the blood-pressure-lowering effect can be most pronounced after the first dose
- Tell your doctor if you are scheduled for cataract surgery, as alpha-1 blockers can affect the iris during the procedure
- Do not stop this medicine suddenly without medical advice, especially if it is controlling your blood pressure
Frequently Asked Questions
What is Cardura XL 4mg Tablet used for?
Cardura XL 4mg Tablet is used to treat high blood pressure and/or to relieve urinary symptoms caused by an enlarged prostate (benign prostatic hyperplasia). Your doctor will confirm which condition it has been prescribed for in your case.
Why might I feel dizzy after my first dose?
Doxazosin can cause a noticeable drop in blood pressure after the first dose or a dose increase, sometimes leading to dizziness or fainting on standing. Taking the first dose at bedtime, as advised by your doctor, and rising slowly can help reduce this risk.
Can this medicine improve both my blood pressure and my prostate symptoms at the same time?
Yes, doxazosin can be used for either condition, and in men who have both high blood pressure and BPH symptoms, your doctor may choose it to address both at once, though the dose used can differ depending on the indication.
I am scheduled for cataract surgery – does this medicine matter?
Yes, tell your eye surgeon and your prescribing doctor that you are taking doxazosin, as alpha-1 blockers are associated with a condition called intraoperative floppy iris syndrome that the surgical team should be aware of in advance.
What should I do if I miss a dose of Cardura XL 4mg Tablet?
Take the missed dose as soon as you remember, unless it is almost time for your next dose – in that case, skip the missed dose and continue your regular schedule. Do not double the dose.
Can I buy Cardura XL 4mg Tablet from DoctorOnCall?
Yes, Cardura XL 4mg Tablet is available through DoctorOnCall, a licensed online pharmacy serving our Malaysian and Singaporean customers. As this is a prescription medicine, you will need to complete an online consultation so a doctor can assess your suitability and issue a valid prescription before the order is processed. This ensures the medicine is appropriate for your condition and used under proper medical supervision, whether you are ordering from Malaysia or Singapore.
Is the medication provided by DoctorOnCall genuine and safe to use?
DoctorOnCall sources its medicines through appropriate licensed pharmacy supply channels for our Malaysian and Singaporean customers. All orders are dispensed and checked by a registered pharmacist before delivery. Always use Cardura XL 4mg Tablet according to your doctor’s instructions and the information provided with the product.
What payment methods does DoctorOnCall accept?
We accept payment via Online Banking, Credit Card, and e-Wallets (Boost, GrabPay) for our Malaysian and Singaporean customers, so you can choose whichever method is most convenient for you at checkout.
Does DoctorOnCall provide an installment payment plan for Cardura XL 4mg Tablet?
DoctorOnCall provides an installment payment plan for eligible Malaysian and Singaporean customers, where applicable. Available plans, eligibility, and terms can vary by market, so please contact DoctorOnCall Customer Service for the latest information on installment options for your order.
Is delivery free, and how much does shipping for Cardura XL 4mg Tablet cost?
Delivery charges may vary for our Malaysian and Singaporean customers depending on your delivery location and the applicable order terms at the time of purchase. For the most accurate and up-to-date delivery fee information, please contact DoctorOnCall Customer Service before placing your order.
How long does delivery take for Cardura XL 4mg Tablet?
Our Malaysian customers can generally expect delivery within 3-5 working days, while our Singaporean customers generally receive their orders within 5-7 working days. These are expected timeframes rather than guarantees, and actual delivery time may vary depending on your delivery location, order processing time, courier operations, and whether the order falls on a weekend or public holiday.
What is DoctorOnCall’s shipping, return, or cancellation policy for Cardura XL 4mg Tablet?
Shipping, return, and cancellation terms may vary for our Malaysian and Singaporean customers depending on the product and your order details. Please refer to DoctorOnCall’s Shipping & Delivery Policy and Return, Refund & Exchange Policy, or contact Customer Service, for the specific terms that apply to your order.
Ingredients / Active Ingredients
- Doxazosin 4mg (as doxazosin mesilate)
Safety Advice
Pregnancy
This medicine should only be used during pregnancy if prescribed by a doctor after careful evaluation.
Breastfeeding
Limited data on excretion in breast milk. Consult a doctor before use.
Kidney
Generally safe, but caution may be required in some patients.
Liver
Use cautiously. Liver function monitoring may be required.
Alcohol
Caution is advised when consuming alcohol with this medicine.
Driving
Use caution while driving until you know how this medicine affects you.
Medical Review
