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Difficulty starting urination, a weak urine stream and the frequent urge to pass urine can affect your sleep and daily routine. These symptoms may occur when an enlarged prostate presses against the urethra and restricts urine flow.
An alfuzosin tablet may be prescribed to relieve urinary symptoms caused by benign prostatic hyperplasia, commonly called BPH. It relaxes the muscles around the prostate and bladder outlet, allowing urine to pass more easily.
Alfuzosin is a prescription medicine. You should take it only under medical supervision. Do not start, stop or change your dose without speaking to your doctor.
What Is Alfuzosin Tablet?
Alfuzosin belongs to a group of medicines called alpha-1 adrenergic blockers, or alpha blockers.
It is mainly prescribed to adult men who have urinary symptoms associated with benign prostatic hyperplasia. BPH is a non-cancerous enlargement of the prostate gland that becomes more common with age.
Alfuzosin can improve urine flow and reduce troublesome symptoms. However, it does not cure BPH or remove the enlarged prostate tissue.
Composition And Drug Class Of Alfuzosin
The alfuzosin tablet composition generally includes:
- Active ingredient: Alfuzosin hydrochloride
- Common strength: 10 mg
- Dosage form: Extended-release or prolonged-release tablet
- Drug class: Alpha-1 adrenergic receptor antagonist
Inactive ingredients differ between manufacturers. You should check the medicine label if you have an allergy or sensitivity to any tablet ingredient.
Some medicines may combine alfuzosin with another active ingredient. Do not assume that all alfuzosin products have the same composition or dosage instructions.
Alfuzosin Uses
The main alfuzosin use is the treatment of urinary symptoms caused by BPH.
It may help relieve:
- Difficulty starting urination
- A weak or interrupted urine stream
- Straining while passing urine
- Dribbling after urination
- A feeling that your bladder has not emptied completely
- Frequent urination
- An urgent need to urinate
- Waking repeatedly at night to pass urine
Alfuzosin is used as a BPH medication for symptom relief. It is not intended to treat high blood pressure, even though it may lower blood pressure in some people.
Urinary symptoms can also be caused by a urinary infection, prostate cancer, bladder problems, diabetes or certain medicines. Your doctor may therefore investigate the cause before recommending benign prostatic hyperplasia treatment.
How Alfuzosin Tablet Works
The prostate surrounds part of the urethra, which is the tube that carries urine out of your body. When the prostate is enlarged, the urethra may become compressed.
Alfuzosin blocks alpha-1 receptors in the smooth muscles of the prostate and bladder neck. This allows these muscles to relax, reduces resistance around the urethra and makes it easier for urine to flow.
You may notice some improvement within the first few days. The full benefit can take a few weeks to develop.
Alfuzosin improves symptoms by relaxing muscles. It does not reduce the actual size of the prostate.
Recommended Alfuzosin Dosage And How To Take It
The commonly recommended alfuzosin dosage for an extended-release tablet is 10 mg once daily. However, your prescription may depend on your health, formulation and other medicines.
Follow these instructions unless your doctor advises otherwise:
- Take the tablet immediately after the same meal each day.
- Do not take it on an empty stomach.
- Swallow the tablet whole with water.
- Do not crush, chew, split or dissolve an extended-release tablet.
- Take it at approximately the same time each day.
- Continue taking it even if your symptoms improve.
- Do not take more than the prescribed dose.
Food affects how alfuzosin is absorbed. Taking it after the same meal each day helps maintain consistent medicine levels in your body.
Some doctors may advise taking it after an evening meal, particularly when treatment begins, because dizziness can occur. However, alfuzosin does not always have to be taken at night. Follow the timing written on your prescription.
Common Alfuzosin Side Effects
Not everyone experiences alfuzosin side effects. Many effects are mild and may improve as your body adjusts to the medicine.
Common side effects include:
- Dizziness
- Light-headedness
- Headache
- Tiredness
- Weakness
- Runny or blocked nose
- Nausea
- Stomach discomfort
- Indigestion
- Constipation
Alfuzosin can cause your blood pressure to fall when you stand up. This is called postural or orthostatic hypotension.
To reduce the risk of dizziness:
- Rise slowly from a bed or chair.
- Sit down immediately if you feel faint.
- Keep yourself adequately hydrated, unless your doctor has restricted fluids.
- Avoid driving until you know how the medicine affects you.
- Take care when using stairs or walking on uneven surfaces.
Speak to your doctor if a side effect continues, becomes troublesome or affects your daily activities.
Serious Side Effects Of Alfuzosin
Serious reactions are uncommon, but they require prompt medical attention.
Seek immediate help if you experience:
- Fainting
- Chest pain
- New or worsening angina
- Severe breathing difficulty
- Swelling of your face, lips, tongue or throat
- A widespread or severe skin reaction
- A fast or irregular heartbeat
- A painful erection lasting four hours or longer
A prolonged painful erection is called priapism. It requires emergency treatment to prevent permanent tissue damage.
Who Should Avoid Alfuzosin Tablet?
Alfuzosin may not be suitable for everyone.
You should not take it without specialist advice if you:
- Are allergic to alfuzosin or any tablet ingredient
- Have moderate or severe liver impairment
- Are taking certain strong medicines that increase alfuzosin levels
- Are already taking another alpha blocker
Alfuzosin is not normally indicated for women or children.
Tell your doctor before treatment if you have:
- Low blood pressure
- Frequent dizziness or fainting
- Severe kidney impairment
- Mild liver impairment
- Angina or another heart condition
- An abnormal heart rhythm
- A personal or family history of prolonged QT interval
- An upcoming cataract or glaucoma operation
Older adults may be more susceptible to dizziness and falls. Your doctor may review your blood pressure, medicines and general health before prescribing alfuzosin.
Drug Interactions And Precautions
Alfuzosin can interact with prescription medicines, over-the-counter products and supplements. Give your doctor or pharmacist a complete list of everything you take.
Important interactions include:
Strong CYP3A4 Inhibitors
Medicines such as ketoconazole, itraconazole and ritonavir can substantially increase the amount of alfuzosin in your blood. These combinations may be contraindicated.
Other Alpha Blockers
Taking alfuzosin with another alpha blocker may increase the risk of dangerously low blood pressure.
Blood Pressure Medicines And Nitrates
Antihypertensive medicines and nitrates used for chest pain may increase dizziness, postural hypotension and fainting.
Erectile Dysfunction Medicines
Medicines such as sildenafil, tadalafil and vardenafil can also lower blood pressure. Combining them with alfuzosin may cause symptomatic hypotension.
Medicines That Affect Heart Rhythm
Tell your doctor if you take a medicine that can prolong the QT interval or affect your heart rhythm.
Alcohol
Alcohol may make dizziness and low blood pressure worse. Ask your doctor whether alcohol is safe for you while taking alfuzosin.
Cataract Surgery
Alpha blockers have been associated with intraoperative floppy iris syndrome during cataract surgery. Tell your eye surgeon that you currently take alfuzosin or have taken it previously.
Do not stop alfuzosin before eye surgery unless the prescribing doctor and eye surgeon advise you to do so.
What Tests May Be Needed Before Treatment?
BPH and prostate cancer can cause similar urinary symptoms. Your doctor may examine your prostate and assess whether further testing is appropriate.
Tests may include:
- A urine routine test to look for infection, blood or other abnormalities
- A PSA test when appropriate for your age, symptoms and individual risk
- Kidney function test
- Blood glucose testing
- Urine flow measurement
- An ultrasound to assess the bladder, kidneys or prostate
- Measurement of urine remaining in your bladder after urination
A PSA result cannot diagnose BPH or prostate cancer on its own. Your doctor will interpret it with your symptoms, examination and other findings.
What To Do In Case Of A Missed Dose
Take the missed dose when you remember, unless it is almost time for your next scheduled dose. Skip it when your next dose is due soon.
Do not take two doses together to compensate for the missed tablet.
Because alfuzosin should be taken after food, ask your doctor or pharmacist what to do if you remember the dose long after your usual meal.
What To Do In Case Of An Overdose
An alfuzosin overdose can cause a significant fall in blood pressure, dizziness, fainting and changes in heart rate.
Seek emergency medical care immediately if you or someone else takes more than the prescribed amount. Do not attempt to manage an overdose at home.
Keep the person lying down if they feel faint and avoid making them stand or walk without support.
When Should You Consult A Doctor Immediately?
Contact your doctor promptly if:
- Your urinary symptoms suddenly worsen.
- You cannot pass urine.
- You notice blood in your urine.
- Urination becomes painful.
- You develop fever, chills or pain in your back.
- You experience repeated dizziness or fainting.
- Your heartbeat feels fast or irregular.
- You develop new or worsening chest pain.
- You experience swelling, breathing difficulty or a severe rash.
- You develop a prolonged painful erection.
An inability to pass urine can indicate acute urinary retention and requires urgent medical attention.
Can You Stop Alfuzosin When You Feel Better?
Do not stop taking alfuzosin without speaking to your doctor. Your symptoms may return after the medicine is discontinued.
Your doctor may periodically review:
- Whether your urinary symptoms have improved
- Whether you are experiencing side effects
- Your blood pressure
- Your other medicines
- Whether you need additional BPH treatment
Some people require a different medicine or combination treatment if the prostate is significantly enlarged or symptoms continue.
Key Takeaways
- Alfuzosin is an alpha blocker used to relieve urinary symptoms caused by BPH.
- It relaxes the prostate and bladder neck muscles to improve urine flow.
- It does not shrink the prostate or cure BPH.
- The common extended-release dose is 10 mg once daily after the same meal.
- Extended-release tablets must be swallowed whole.
- Dizziness, headache and tiredness are common side effects.
- Alfuzosin can interact with blood pressure medicines, nitrates, erectile dysfunction medicines and strong CYP3A4 inhibitors.
- Tell your eye surgeon about alfuzosin before cataract surgery.
- Seek urgent help for fainting, chest pain, breathing difficulty, urinary retention or a prolonged painful erection.
Regular medical follow-up is important when you have urinary symptoms. A urine test, PSA test or kidney function assessment may help your doctor investigate the underlying cause and monitor your health.
Metropolis Healthcare offers more than 4,000 tests, speciality testing and reliable reports supported by expert pathologists. Where suitable, you can arrange a blood test at home through the website, app, call or WhatsApp. Its home collection network includes 10,000 touchpoints, making preventive screening and ongoing health monitoring more convenient. A suitable full body checkup can also help you keep track of broader health markers, but it should not replace a targeted medical evaluation for prostate or urinary symptoms.
FAQs About Alfuzosin Tablet
Is Alfuzosin Bad For The Kidneys?
Alfuzosin is not generally considered directly toxic to the kidneys. However, it should be used cautiously if you have severe kidney impairment because clinical safety information in this group is limited. Tell your doctor about any kidney condition before taking it.
Why Do You Take Alfuzosin At Night?
Some doctors recommend taking alfuzosin after an evening meal because dizziness or light-headedness may occur, especially when you first start treatment. However, the key instruction is to take it after the same meal every day. Take it at night only if this matches your prescription.
Can Alfuzosin Help With Enlarged Prostate?
Yes. Alfuzosin can relieve urinary symptoms associated with an enlarged prostate by relaxing muscles around the prostate and bladder neck. It can improve urine flow and reduce urgency, frequency and difficulty starting urination.
Can Alfuzosin Reduce Prostate Size?
No. Alfuzosin does not reduce prostate size. It improves symptoms by relaxing smooth muscles around the urinary passage.
Does Alfuzosin Cure BPH?
No. Alfuzosin controls urinary symptoms but does not cure BPH. Your symptoms may return if you stop taking it.
How Long Does Alfuzosin Take To Work?
You may notice some improvement within a few days. It can take several weeks to experience the full effect. Contact your doctor if your symptoms do not improve or become worse.
Can Alfuzosin Cause Sexual Side Effects?
Sexual side effects can occur, although they are not experienced by everyone. Tell your doctor if you develop erectile or ejaculation problems. A painful erection lasting four hours or longer is a medical emergency.
Can You Take Alfuzosin With Erectile Dysfunction Medicine?
The combination may cause a significant fall in blood pressure. Do not combine these medicines without your doctor's approval. Your doctor may adjust the timing or dosage and monitor you for dizziness or fainting.
References
- DailyMed. Alfuzosin Hydrochloride Extended-Release Tablets: Full Prescribing Information. United States National Library of Medicine; revised January 2026.
- MedlinePlus. Alfuzosin Drug Information. United States National Library of Medicine; updated 2025.
- European Association of Urology. EAU Guidelines on the Management of Non-Neurogenic Male Lower Urinary Tract Symptoms. 2026.
